Product Review: Opticron Aurora BGA VHD 8 x 42.

The Opticron Aurora BGA VHD 8 x 42 package.

Product: Opticron Aurora BGA VHD 8 x 42

Country of Manufacturer: Japan

Chassis Material: Magnesium Alloy

Exit Pupil: 5.25mm

Eye Relief: 20mm

Field of View: 141mm&1000m(8.1 angular degrees)

Coatings: S-H type multi-coating to all air/glass surfaces,Phase corrected prisms with Oasis prism coating

Dioptre Compensation: +/- 5

Close Focus: 1.9m advertised, 1.94m measured

Water Proof: Yes

Nitrogen Purged: Yes

ED Glass: Yes, VHD optical system incorporating field flattening technology and high quality ED glass objective system

Weight: 725g advertised, 711g measured

Dimensions: L/W/H 15.2×13.2×5.2cm

Accessories: Premium quality soft Cordura case with rainguard, neoprene bungee strap and rubber objective lens covers

Warranty: 30 years

Price(UK): £799.00



In this review, I’ll be test driving Opticron’s new flagship binocular, the Aurora BGA VHD 8 x 42.


Tune in soon for full details…………………….


De Fideli.


Take a Closer Look.

If you abide in my word, you are truly my disciples, and you will know the truth, and the truth will set you free.                                                   

                                                                                                            John 8:31-32



In this blog, I’ll be exploring subjects of general interest/concern, as our societies become increasingly wicked and deceived.


The Dark Side of Transgender Medicine


How the Media Manipulates Truth


Cogito Ergo Sum


The Secular Case Against Homosexuality


Our Fragile Home


The Anti-Social Network


A Form of Child Abuse


Cool stuff you never hear in Church


The Rise of Homeschooling


James Clerk Maxwell: a Great Life Lived


Reasonable Faith: An Interview with Professor Alvin Plantinga


Doubting Dodgy Science


Evaluating World Views


Depraved Minds


The Beauty of the Creation


The Preciousness of Free Speech


Walking your Way to Good Health


Did the Eye Really Evolve?


Unholy Alliance: when Dodgy Science Merges with Theology


The Truth about UFOs


The Rise of Neo-Paganism


From Spiritual Shipwreck to Salvation


The Rise in Euthanasia Killings


The Greatest Story Ever Told


Holocaust Survivor


Coming Soon to a Town Near You: The Rise of Bestiality


The Death of Naturalism


From Gaypo to Paedo


When Scientists Lose the Plot


The Sixth Mass Extinction Event in Our Midst


‘Depth Charging’ the Values of the Ancient World


The Truth about the Fossil Record




The Language Instinct


Not the Same God


Greening the Deserts


Moving the Herds


Evolutionary Atheist gets his Facts Wrong…..Again


Distinguished MIT Nuclear Physicist Refutes Scientism


Pursuing Truth


The Dangers of Yoga




Get thee right up thyself! : The New Transhumanist Religion


The Biblical Origin of Human Rights and why it’s a Problem for Atheists


A Closer Look at the Israeli-Palestinian Conflict


Winds of Change: Prestigious Science Journal Concedes Design


A Distinguished Chemist Speaks the Truth


The Scourge of Pornography




Bart Ehrman Debunked


An Evil Generation Seeks After a Sign


Decimation of Global Insect Populations


The Spiritual Suicide of a Once Christian Nation


Mass Animal Deaths Worldwide


Not Going Anywhere


UN Report: World’s Food Supply under ‘Severe Threat’ from Loss of Biodiversity


False gods of the New Age


From Abortion to Infanticide in the “Land of the Free”


Sports Personalities Speak Out Over Transgender Athletes


Magonus Sucatus Patricius


Celebrating a Killing


Human “Out of Africa” Theory Debunked


The Other Side of the Rainbow


Vintage James Tour: How to Cook Up a Proto-Turkey


Big Brother Watching


Follow the Evidence: The Problem of Orphan Genes


Follow the Evidence: The Genius of Birds


The Butterfly Enigma


Man’s Best Friend


Darwinian Evolution On Trial Among Biologists


New Fossil Finds Thwart Human Evolutionary Predictions


Global Persecution of Christians


 Ratio Christi


Questions About the Qur’an


Engaging with Islam


Calling Evil Good




Tall Tales From Yale: Giving up Darwin.


More on the Proto-Turkey:  Dr. Tour Responds to Cheap Shots from the Pond Scum Merchants


Good Riddance: Despicable British TV Show Axed after Death of Participant


There’s Heehaw Out There…ken.


The Fastest Growing Insanity the World has Ever Seen




Darwinism & Racism: Natural Bed Fellows


The Modern Root of Anti-Semitism


Jesus & Archaeology


A Victory for Common Sense: Transgender Weightlifter Stripped of his Medals


The US Equality Act: A Plea for Caution


Reunited: Music & the Human Spirit


Gladys Wilson


1st Century Christian Insight: The Didache


The Clothes Maketh the Man


Why Some Books were Left Out of the Bible


Why the Human Mind is not Material


What God Thinks of Scientific Atheism


For the Love of the Creator


An Essential Component of a Modern Education


Peace Cross


Earth: “Presidential Suite” of the Universe


How to Really Stand Out in a Crowd


Straight from a NASA Scientist: Jewel Planet


The Singularity


No Life Without Super Intelligence


Darwinism as a Cargo Cult


Body Plan Development Raises New Headaches for Evolutionists


Membrane Biochemistry Stymies Evolutionary Origin of Complex Cells


Science Speaks: Common Abortafacients Harmful to Both Mother & Child


Biblical Ignoramus Twists the Words of Christ


Apologia Part I

Part II

Part III

Part IV

Part V

Part VI


Attention Parents: American Psycho Association Promoting Polyamory to Pre-Teens as ‘Ethical.’


The Only Rainbow God Recognises


Calling Time Out on Evolutionists’ Failure to Explain The Cambrian Explosion


7 Reasons to Reject Replacement Theology


Psychiatric Diagnoses are ‘Scientifically Meaningless’ Study Shows


Out of a Far Country: A Gay Son’s Journey to God


Universalism Debunked


The Prosperity Gospel Debunked


New Science Reveals First Cellular Life to be “Amazingly Complex”


New Law Firms Being Established to Counter the Rise in Christian Persecution


Playing the Numbers 32:23 Game


Multiple Lines of Scientific Evidence Converge on 3rd Century BC Age of the Famous Isaiah 53 Scroll.


Meet the Gestapo


Exposed: Theologians Deceived by Darwinian Ideology


New Insights into the Shroud of Turin


What we Know and Do Not Know About the Human Genome


Debunking Da Vinci Code Tosh


Sorry: No Such Thing as “Gay” Penguins


Genetic Entropy


Dunderheid Alexa


The Extinction of Reason


A Biblical Perspective on Diet


Revelation: Number of Transgender People Seeking Sex Reversals Skyrockets


Psychologist Debunks Pseudoscientific Explanations for Human Love & Compassion


The Dismantling of the Feminine


Disturbing Trends in the Roman Catholic Church


N = 402


The Nazareth Inscription


A Christian Response to Halloween


Seeking Methuselah


Beware the Enneagram


No Safe Spaces!


Pale Blue Dot


Encyclopedia Galactica


Phillip E. Johnson: A Tribute


The Darwinian Response to Human Life: Let the Baby Die!


The Best Explanation for Beauty


What is Feminism?


Insects & Light Pollution


Candy-Ass Christianity


Antiobiotic Resistance in a Post-Darwinian World


Adam & Eve: Redux


Joyce Meyer


Michael Behe Says No to Theistic Evolution


New Atheism: An Autopsy


Serenading an Old Girl.


“Progressive” Christianity as a Political Cult.


The Church of Satan, Sweden


A Rational, Christian Response to Humanism


More Depravity: the Sexualisation of Children


Shameful Humanity:  Murder of the Unborn Now the Biggest Worldwide Killer.


Origin Stories


Privileged Planet




Sorry Sam Smith, You’re Still a ‘He.’


Nature Genetics: How ‘Evolutionary Thinking’ led Biologists Astray about Pseudogenes.


A Kingdom Divided Against Itself: Why Evolutionary Psychology is Bunk


Of Melting Glaciers and Darwinism


First US President Addresses 47th March For Life, as theSecular Media Duck for Cover


Wolves Among the Sheepfolds


The New Science of Separate, Distinct Creations


That Sacred Space


Faith of the Fatherless


More Tales of Darwinian Thuggery


Keeping your Children Strong in the Faith


Former Editor of Nature Waves Bye Bye to the RNA World


At Scientific American: Physicist Pours Cold Water on Scientism


A Biblical Perspective on Alcohol Consumption


High Priest of a Pseudoscience Rears His Ugly Head Again


Another Step into the Human Immorality Sewer: Normalizing Throuples & Sologamy


Symptom of a Depraved Society: Scientists Now Fighting to Affirm a Basic Fact of Life: Sex is Binary


Speaking the Truth in Love: Where the LGBTQ Community is Ultimately Headed


The Power of Biblical Prophecy: The Triumphal Entry of Jesus into Jerusalem


Origin of Life Debate: James Tour versus Lee Cronin.


7 Rock Solid Scientific Arguments for the God of the Bible


SETI@Home Shuts Down


An Existential Crisis in Neuroscience


AI Hype and the End of Moore’s Law


Discerning Fact from Spin/Fiction in Cosmos 3.0


Polly’s No Statistician!


Why All the King’s Horses and All the King’s Men Cannot Put Humpty Together.




The James 5:16 Phenomenon; the Healing Power of Prayer


Heart of Darkness: Organ Harvesting of Chinese Prisoners


Confessions of a (yet another) Darwinian Sceptic




Darwinism as a Mentally Retarding Virus


Who is the God of the Bible?


Legendary Biologist Claims Atheism has Nothing to do with Science


Why Nature Should Never be Worshipped


What ‘Evolutionary Theory’ is Really Good at Explaining: Cancer.


Avoiding the Most Deadly Virus of All


The Prince of Peace Versus the Prophet of Islam


Coronavirus Outbreak Spurs Record Bible Sales


More Tales of Woe for Darwinian Junk Science: No Such Thing as Pseudogenes


Earth Fine-Tuned for Space Exploration


Pious Frauds


The CCP Virus


By the Rivers of Babylon


Abiogenesis & the Tooth Fairy


A Whale of an Evolution Tale


New UN Report: COVID-19 will Produce Famines of ‘Biblical Proportions’


American Schism


An Interview with Dr. Frank Turek


The S-Blob


Neanderthal DNA & the Leviticus 18:23 Question


Debunking Scientific Materialism through Mathematics


Incompetent Experts & Bad Government


Intelligent Design Now Thriving in Europe


Cosmic Fine-Tuning: an Interview with Christian Cosmologist, Dr. Luke Barnes.


Ivy League Philosopher Dismisses Evolutionary Psychology as  Pseudoscience


Preterism Debunked


Ravi Zacharias(1946-2020) RIP


Ten Things you Need to Know about Scientism


Why Humans have Souls


Freeman Dyson: God is a Mathematician


J.K. Rowling Takes a Stand Against Militant LGBT Activists


Humans Together


Talking about Racism


Lest We Forget: William Wilberforce


Update on the Long Term Evolution Experiment(LTEE): Sickening News for Evolutionists


An Interview with Mathematician William Dembski


Fatherless America


A Technical Look at Fine-Tuning in Biological Systems


David Pawson(1930-2020) Remembered


The Colour of Christian Art


Date Setters


Punctuated Equilibrium Debunked by Researchers


Harari’s Fictions


For the Attention of Greta Thunberg


Why We Should Cancel Darwin


No Ordinary Star


Darwin, Africa & Genocide 


What Everyone Should Know About the BLM Movement


The Principles that Made America Great:

Part I

Part II


The Artifact Hypothesis Debunked


Why the Multiverse is Bunk


Why Christians Should Support Israel’s Claim to the West Bank


Earth’s Deep Water Cycle Fine-Tuned for Life


When Darwinism is Applied to Politics


Science Update on COVID-19


COVID-19: The Economic Fallout


Whale Evolution Further Debunked Part 1

Part 2


New ENCODE Results Unveil Still MORE FUNCTIONS in So-Called Junk DNA.


Concerning Energy


The Politicisation of Hydroxy Chloroquine


The Wonders of the Human Mind Part 1

Part II

Part III


God Among Sages


Trapped by Language: Why Biologists Can’t Avoid Teleological Verbiage


A Little Lower than the Angels


Heretic Pope Affirms Transgender Depravity


Latest on Orphan Genes Affirms Creationism


For Math Challenged Woketards: Two Plus Two Really Equals Four


A Critical Review of Josh Swamidass’ Book, The Genealogical Adam and Eve


Angels & Demons


Worrying Developments in the American Workplace


The Decadence of Gender Ideology


Electric Mud


 Strictly Come Dancing Turns Gaypo


The Philadelphia Statement


Graceland Vandalised by BLM Thugs


Update on Recent Desperate Attempts to Find a Naturalistic Origin of Life


More Bad News for Pond Scum Merchants: No Sign of ETI in New Mega-Survey


Netflix Promotes Paedophilia


Open for Business


Cultural Marxism


A Lost Generation


World Class Paleontologist Debunks Ancestors to Cambrian Animals


Empire of the Beast


Religion of Green


How Christians Should Respond to Environmental Issues


Breakthrough: Intelligent Design Theory Now Being Published in Mainstream Science Journals


Woke Pope


The Great Barrington Declaration


The Astonishing Hypothesis


Facebook n’ That


Auschwitz Rising


Jesus was No Socialist!


Facebook Removes Ex-Gay Testimonies


Responding to Richard Dawkins & The Old Testament


The Perils of Favouritism & the New “Woke” Gospel


British NHS Defends Giving Sex Change Hormones to 10 Year-Olds


American Pastors Organising to Fight Back Against “Tyrannical” Democrat Shutdowns


The Rule of Six


The Left’s Communist Manifesto for America


The Origin of the Lockdown Mentality


The Developing Beast System : Apostate Pope Attends One World Religion Event


Victory for Common Sense: UK Equalities Minister Blasts BLM & Critical Race Theory


Update on Masks


No Phosphine Found In the Venus’ Atmosphere Follow-Up Study Shows


A New Call for the Retraction of the Original Paper After Another Analysis of the Data


Another Negative Report


Yet Another Rebuttal


First Eukaryotic Cells were Already Complex


When Scientists Make Truth Claims Outside Science


Warning to Masktards: A Distinguished Neurologist Speaks


Davos Great Reset


Did China Fund The Phony Joe Biden Campaign?


The Great American Coup


Democrat-Run Oregon Decriminalises Crystal Meth, Heroin and Cocaine Use, as its  Cities Burn.


Why Origin of Life Researchers Must Embrace Intelligent Design


Should Christians Ever Employ Civil Disobedience?


Are Bacteria Really Evolving?


Catholics Discuss their Apostate Pope


Marxism Appropriated to the 2020 US Election


Trump Administration’s Operation Warp Speed Develops Moderna Vaccine with 95% Efficacy


Veteran Military Chaplin Fired from US Air Force for Holding Biblical Views on Sexual Morality


Schooling Masktards: Multiple Studies Show Masks are Ineffective and Possibly Harmful


An Amusing Take on the Utah “Monolith”


From the USA: A Major Victory Over LGBTQ Tyranny


Sidney Powell’s Kraken


Treasure Trove of Rock Paintings Dating Back 12,500 Years Discovered in Remote parts of Colombian Rain Forests


Sick Morality: As Countless Unborn Humans Are Murdered, Activists Push for “Personhood” Rights for Elephants


Galapagos Finch “Evolution” Debunked


After Weighing the Evidence, Medic Ditches Theistic Evolution for Intelligence


Some Effects of Transgenderism


Leaked: Biden Administration Urged to Persecute American Conservative Christians


Advanced Computer Models on Earth’s Long-term Habitability Continue to Affirm its Extreme Rarity/ Uniqueness


Raven Intelligence Raises More Problems for Evolutionists


I’ll Own What I Choose to Own and my Happiness is none of your Damn Business……Comrade!


Another Defeat for Darwinian Junk Science: the Thymus is Not a Vestigial Organ


Argentinian Socialist Government  Legalises Abortion


Morons in da House


Requiem for the American Republic


A Catholic Priest Comments on the Consequences of the 2020 US Election


Warring Against the Beast


Darwinian Time Trees Don’t Work, New Analysis Suggests


Battle for the Soul: Surviving a Chinese Communist Re-Education Camp


The New American State Religion- Wokeness


Conservatives: You Gotta Get Your Kids out of Illinois Public Schools


New Geochemical Research Findings Affirm the Genesis Creation Account


An Interview with Dr. John Sanford


Illinois Christian High School Student Faces Disciplinary Hearing after Refusing to Take a Class on Deviant Sexual Behaviour


Did the American People Really Vote this Guy in?


The Curious Case of Ivermectin




Burn it Down!


New Zealand: where Capitalism Triumphed over Socialism


Hitting Woke Big Tech & the Fake News Media where it Hurts


More Bull from the Masktard King


The Devout Catholic


Yet Another Putative Human Evolutionary Ancestor Debunked 


Marxist Pope Francis Pushes Great Reset


Revisionist View of Homosexuality Debunked


Poisoning of the Youth: A look at Amerika’s New, Ultra-Woke School Curriculum


From Newsweek: Transgender Man Warns Others About the Dire Health Consequences of Her Actions


The Wonders of Honey


Curbing Wokeness & Cancel Culture: UK to Introduce Legislation which will Fine Universities that Limit Free Speech


It Happened on Your Watch: How the Rise of Evil is Destroying American Cities



Great Reset Creep’s Plan to Destroy the American Agricultural Industry


Lessons for the USA: Venezuela’s Experiment with Socialism Falters as it Embraces Privatisation


New Insights into ‘Super’ Earths Suggest they’re Uninhabitable


Insane Biden Administration Destroying Girl’s Sports


Amazon Quietly Removes Book Criticizing Transgender Ideology




Just Like You!


Dozens of House Democrats Requesting Biden to Relinquish Sole Authority to Launch Nuclear Weapons


What the Equality Act Means for Ordinary US Citizens


Great Reset Creeps Suffer a Propaganda Crash


Why Darwinian Junk Science Remains Popular with the Pagan Masses




Another Evolutionary Icon Bites the Dust: Beta Globin Pseudogene Shows Functionality


Are Electric Vehicles Really the Future?


Prehistoric Cave Art & The Imago Dei


Vatican Clarifies its Position on Same Sex Relationships – Declares them “Sinful”


Where Cancel Culture Naturally Leads


Self-Evident Truths


New York Columbia University’s Woke Graduation


Long-term Study from 10,000 Generations of Yeast Cells Reveals Devolution not Evolution


What the Green New Deal is Really All About


Avi Loeb’s Oumuamua Alien Hypothesis Debunked


What Everyone Needs to Know About the Proposed Vaccine Passports


America: Land of the Insane


Son of the Devout Catholic


Mars & Nestle Join the Woke Brigade


Attention Parents: What the Sexually Depraved are Now Teaching Your Children 


What Next? Incest?


Ten Reasons why Birds are Not Living Dinosaurs


An Open Letter to John Kerry


Covidian Masktard Evolution


Debunking More Pseudoscience: New MIT Study Shows Social Distancing Rules Are Completely Pointless


From a Leading UK Journalist: Biden is Smashing America’s Moral Compass


You What? Even the Spineless CNN Calls out Biden as a Masktard


Obama Administration Scientist Admits “Climate Emergency” is Bunk


Richard Dawkins’ Desperate Claims about the Origin of the Bacterial Flagellum Now Disproven


Fighting the Marxists: US States Begin to Ban the Teaching of Critical Race Theory in Schools 


Sickos: Have a Very Happy Woke Birthing Person Day!


Woke British Universities Could Face Fines for Suppressing Free Speech/De-platforming Guest Speakers


Journey out of Mormonism


Fighting Back: Concerned Ohio Parents Take a Stand Against the Teaching of Marxist Critical Race Theory in Public Schools


Marxist Ideologies Infiltrating the US Military


Darwin’s Tree of Life Finally Gets the Chop


Imago Dei


Covid 19: What We Now Know


Evidence for the Biblical Exodus


Gaps Everywhere in the History of Life!


For the Memory of Shang Di


From Prager: How to Re-Take A Nation from the Marxist ‘Democrats’


The Transgender Contagion Corrupting the Youth of the World


Nickelodeon Ratings Crash Amid LGBTQ Push


News from Canada: Campaign for Sexual Immorality Extended From a Month to a Season


Who did Allah Love in Eternity?


Critical Race Theory: A Crash Course


Pushing Back: Australian Parliament Bans the Teaching of Critical Race Theory in the School Curriculum


Long Awaited Pentagon UFO Report: A Big Fat Nothing Burger


Landmark Study on Heme Biosynthesis and Storage Raises Major Headaches for Evolutionists- Spectacularly Confirms Intelligent Design


Culture Wars: France Tells US  ” Keep your Wicked Wokeism to Yourself!”


O’ Biden Regime Spying on Prominent Conservative TV Personality


Welcome to the New Cult of ‘Safetyism’ 




Allan Sandage: An Astronomer’s Journey to Faith


Climate Models: Worse than Nothing?


Trump Goes After the Big Tech Bottom Feeders


From Trans to Frankenstein


More Bad News for Evolutionists: Landmark Study Shows Endogenous Retroviral (ERVs) Play an Essential Role in the Immune System


US Military Goes Woke


While America Leans Ever Closer to Communism, Cuban People Take to the Streets to Condemn it


What the Darwinist and Transgender Lobby Share in Common


 Sex Mania-Induced Societal Psychosis


What Next? Climate Lockdowns?


Inspired by Crystal Meth?




Trump Discusses  Arizona Audit Findings and the Biden Regime’s Disastrous Record in Government


About Kamala


The Covid-19 Files: The Curious Case of Sweden


An ID Prediction Concerning CRISPR Gene Editing


7 Lies your Kids Pick Up in the Secular World and How to Correct Them


The Link Between the Political Left and Paedophilia


Evolution of Daphnia Debunked


COVID-19 Survivors Display Stronger, Better Immunity to the Virus than Vaccinated Individuals


Massive Increases in Home-Schooling Across USA


British Bull Corporation(BBC) Goes Woke


Mark Zuckerberg Launches Church of Beelzebub


Why Biblical Justice Trumps Social Justice


The Wonderful World of Diatoms


Distinguished Scientist Breaks Down the Climate Change Hoax


Forgive Them Lord, for They know Not What They Do: Brainwashed Gen Z Sleepwalk Their Way into Socialism


The Ministry of Truth Comes to Life


Antipodean Darkness: Australia Bans Peaceful Protests Against Abortion


Agenda 2030


What to Make of the 6th IPCC Report


Antipodean Control Freaks


Manning UP


Hungary: a Beacon of Christian Freedom 


The Taliban and their Worldview


Stop the Mandate


The Rise of Systems Biology


New Peer Reviewed Study Suggests the Sun and not Human-Derived Carbon Dioxide is Driving Climate Change


The Masktards Who Live by Lies


Why Atheists Can’t Think Straight


Arthropods Amaze Engineers!


Normalising Sexual Deviancy in Scottish Schools


Peppered Moth Evolution Debunked


Deflating the Multiverse & the New Atheists


The Mystery of Life Lies Beyond Science


From The Times of London: US 2020 Presidential Election was Rigged


Vindicating Michael Behe: More Evidence for Devolution and Not Evolution: Yeast Splicosome was More Complex in the Past than Today


Why Pronouns Matter……but not in a Woke Way


UK Athletic Equality Group Deems Trans Sports Unsafe And Unfair


Francis Collins & His Moral Failings


How the Maggots at Facebook Helped The O’ Biden Marxist Regime Over the Line


Leading Mainstream Science Journal Now Waving Bye Bye to Junk DNA


Wikipedia Slides Down the Leftist Sewer


More Facts for the Brainwashed Masktardii


Did Humans Evolve from Ape-like Ancestors? The Evidence is Surprisingly Weak!


Marxist Kalifornia’s Attack on Smart Kids


William Lane Craig: Heretic


Green Murder


A Critical Review of Yuval Harari’s Sapiens


Why We Should All be Sceptical of Human Evolution


It’s Official: Roads are Racist!


The Fables Told by Evolutionary Psychologists


A Visit to the Museum of Lies


Masktards on Planes


From Norway: Santa Turns Gaypo


Vicar of the New World Order


Conversion Therapy


Tales from an Ozzy Covid Quarantine Camp


The Depravity of Gen Z


Go to Work on an Egg


The Benefits of Traditional Marriage


Ethnos Against Ethnos at a Denver Elementary School


Reflections on the Launch of the James Webb Space Telescope


Deception: NASA Hires ‘Theologians’ to Study Humanity’s Reaction to ET


More Tales of Woe for Brainwashed Darwinistas: The Bacterial Flagellum Could Not Have Evolved


When Wokeness Comes Back to Bite the Hand that Feeds


Problems with Common Ancestry 


Why Evolutionary Explanations of Adam & Eve Fail


Why Climate Change Alarmists Embrace Authoritarianism


Cambrian Explosion Occurred in Just 410,000 Years New Study Reveals


Jordan Peterson Resigns His Chair in Protest of the Wicked & Woke University of Toronto.


Wicked Leftist Scottish Government Pushing to Criminalise Biblical Views on Marriage and Sexuality


The Roman See


A Message for Young Americans


More Education for the Masktardii


Told You So: Lockdowns Accomplished Nothing


Biology of Second Reich Censored by the Evolutardii


Collapse of the Communist News Network(CNN)


Kalifornian Junkies




What You Need to Know About January 6


The Paedophile Files


Buddhism Debunked


Klaus Schwab: a Closer Look


Kalifornian Child Murderers


The Wicked US Democratic Party’s Attack on Christians


The Illusion of Evidence-Based Medicine


Christian Transhumanism Debunked


The New Woke Religion


Ditching Disney


Schooling Darwinistas: Species Pairs & The Waiting Time Problem


Elon Musk’s Twitter Takeover: A Christian Response


The O’ Biden Regime’s Ministry of Truth 


US Public & Private School Pushing Sexual Perversion


2000 Mules: How the US 2020 Presidential Election was Stolen


Church of Scotland Now the Church of Sodom


Top Ten Dystopian Ideas Discussed by the Invertebrates at the WEF


Perilous Times Ahead for Australian Christians & Conservatives


Curse Amulet


What the Early Church Taught about Abortion


New York Slimes Embraces Inflation as a Marxist Virtue


The Long Road To ‘Positive’ Paedophilia Part 1

Part 2


Sentient AI Debunked


Surviving the Month of Sodom


Woke Ozzie Politician Loses the Plot

Product Review: Vortex Diamondback HD 10 x 32.


The Vortex Diamondback HD 10 x 32 package.



A Work Commenced July 4 2022


Product: Vortex Diamondback HD 10 x 32

Country of Manufacture: China

Chassis Material: Aluminium

Exit Pupil: 3.2mm

Eye Relief: 14mm

Field of View: 113m at 1000m(6.5 angular degrees)

Coatings: Fully Broadband Multi-coated, phase correction and dielectric coatings on BaK4 prisms, Armortec anti-scratch coatings applied to outer lenses.

Dioptre Compensation: +/- 4

Close Focus: 1.8m advertised, 1.84m measured

Water Proof: Yes

Argon Purged: Yes

ED Glass: Unknown

Weight: 454g advertised, 451g measured

Dimensions: H/W 11.2/12.7 cm

Supplied Accessories: Padded neck strap, logoed hard clamshell case, tethered rubberised objective and rain guard, microfibre cloth,  instruction sheet, VIP Warranty

Price(UK): £183.92


The compact 30 to 35mm aperture class of binoculars has emerged as my personal favourite size. Offering a solid binocular experience in a light weight body, they are ideal for daytime use and so enjoy enormous popularity among birders, hikers and general nature enthusiasts. There was a time not so long ago when obtaining a quality optic meant forking out a sizeable amount of money, but thankfully those days are now well and truly behind us.

In a previous review(see the preamble link above), I showcased the Diamondback HD 10 x 42, discovering its many virtues, both optically and ergonomically. Here I wish to discuss my findings about its smaller sibling, the 10 x 32 model.  This is a third generation binocular, having being upgraded in 2019 with a higher quality optical system than the previous( 2016) model.

The package I received was pretty much identical to the larger 10 x 42 model, save for the inclusion of a smaller clamshell case(see the image above) which better fits the smaller frame of the 10 x 32. And just like the 10 x 42 Diamondback HD, the 10 x 32 possesses the same quality ergonomic features of its larger sibling. The lenses are fully multicoated throughout, the prisms are treated to a phase correcting coating and the use of high-reflectivity dielectric coatings ensures a high level of light transmission. of the order of 85 per cent.


Though considerably smaller and less massive than its 10 x 42 sibling, the 10 x 32 Diamondback HD proved to be equally well made, possessing a smooth focusing wheel with no play or backlash, a tightly set right eye dioptre ring which maintains its position well, a pair of solidly made twist up eyecups with three positions that lock firmly into place, and all built around a very sleek and stylish aluminium alloy chassis that tips the scales at only 451g.

In field use, the instrument is easy to get your hands ’round, thanks to a decently short central bridge and barrels long enough to allow your fingers to grip the instrument with confidence. The green rubber armouring also has enough friction to prevent any slippage, even in wet weather.

Like its larger siblings, the Vortex Diamondback HD is an ergonomic delight to handle.

The ocular lenses are stated to have 14mm of eye relief. Using my eyeglasses however, I was not able to make out the entire field.

The objectives give a nice purple tinted view when viewed in bright sunlight, but they are not deeply recessed, which is not ideal for controlling stray light, dust and rain. Thankfully though, these binoculars are o-ring sealed with dry argon gas, making them fog proof and water proof, at least on paper.  In addition the outer lenses are treated to Vortex’s proprietary Armortec coatings, which provide additional protection from scratching, and the accumulation of water droplets and oil from grubby fingers.


The 32mm objectives on the Diamondback HD have good multi-coatings though they could be recessed a little bit more within their barrels.

The underside of the binocular has two small thumb indents, presumably to guide your hands to the ideal places to grip the instrument. In practice however, I never used them.

Note the two small thumb indents on the underside of the binocular.

All in all, this is a very nicely designed and refined binocular, with very well thought out ergonomics. Top marks to Vortex here!


I began my tests as usual, looking at an intensely bright beam of white light to see how the optics behaved. The results were excellent; there were no internal reflections or diffraction spikes and very little in the way of diffused light around backlit targets as seen from across my living room. The same was true when I looked at a bright yellow sodium vapour street lamp at night. This will be a good binocular to view illuminated objects after dark.

Next, I examined the exit pupils to test for light leaks. The results were quite good. There was little in the way of stray light immediately around the pupils, though the right ocular showed the merest sign of truncation. Some light leaks were evident further from the pupils as the images below show:

Left exit pupil.

Right eye pupil

I performed most of my optical testing during daylight and under a variety of conditions, on bright, sunny days and during fairly dull, overcast conditions. Collimation was spot on! The images served up under most conditions were quite impressive, the binocular delivering very bright, pin sharp and high-contrast images with a very neutral colour tone. To my eye, there is quite a sparkle to these Diamondback HD images, especially when viewing targets in the centre of the field under good lighting conditions. The sweet spot is very generous in the 10 x 32 Diamondback HD. Indeed, most of the field remained pleasingly sharp with some minor field curvature and pincushion distortion creeping in near the field stops. Chromatic aberration was quite well controlled too, especially for a 10x glass. I detected the merest trace on axis by examining the brilliant white plumage of a Mute Swan against a dark water background. When examining leaves strongly backlit against a bright overcast sky inside a forest, I detected some very minor lateral colour but nothing that rendered the view particularly distracting.

Another thing that impressed me about the 10 x 32 Diamondback HD image was the very generous field of view: 6.5 angular degrees. That’s way larger than the 10 x 32 GPO Passion ED I showcased some time ago, which only manages a 6 degree true field in comparison. Indeed many 10 x 42 binoculars I’ve tested in the past only managed to serve up field sizes of the order of 6.2-6.3 degrees in comparison. The larger true field of the 10 x 32 Diamondback HD renders the view more immersive and engaging. And unlike some reports I’ve read about the 8 x 32 model from this series, there was no sign of chromatic aberration of the exit pupil, which manifests itself in a colourful ‘ring of fire’ circling the field stops.

The only optical effect I found slightly distracting was glare, which shows up when the instrument is pointed toward a setting Sun, either in a clear blue sky, or when veiled behind some clouds. Mild veiling glare also manifested itself when viewing the topmost boughs of conifer trees against a bright overcast sky. Fortunately though, much of this glare can be removed simply by shading the objectives with an outstretched hand.

Notes from the Field

The Vortex Diamondback HD 10 x 32 is an enjoyable instrument to use in the great outdoors, its light weight but tough, waterproof design, adding to its charm  Close focus was measured to be 1.84m, a really good result, especially if you like looking at butterflies and other insects at close hand. Depth of field is decent for a 10x roof.  The focus wheel operates flawlessly, being neither too slow or too fast. Unlike the GPO Passion ED  10 x 32 model I tested extensively, there is no free play in the focuser. I’ve expressed some tolerance for a small amount of play in a binocular focuser in the past, but these days it has become more of an annoyance. That’s especially the case, since the Diamondback HD costs considerably less than the GPO! The HD labelling of the Diamondback is still somewhat of a mystery to me, as I’m still not sure if ED glass was employed in its design. Not that it matters that much; some of the best instruments I’ve looked through don’t use any!

Conclusions & Recommendations

The Vortex Diamondback HD 10 x 32 is a terrific little binocular. It looks and behaves like a much more expensive instrument. Its powerful magnification boost coupled to its wide and well corrected field of view create the instant impression of a quality instrument. Vortex really hit the ground running when they launched this excellent low-cost binocular range. I often wonder if a fourth generation Diamondback will someday see the light of day. Slightly better coatings and more deeply recessed objectives and/or more aggressive baffling, would go a long way to making a very good binocular great!


Highly recommended!



Neil English is currently writing an in-depth buyer’s guide for binocular enthusiasts. Choosing Binoculars – a Guide for Stargazers, Birders and Outdoor Enthusiasts, will be published by Springer Nature in late 2023.


De Fideli.

Book Review: The Miracle of Man by Michael Denton.


Title: Miracle of Man: The Finetuning of Nature for Human Existence

Author: Michael Denton MD PhD

Publisher: Discovery Institute Press

ISBN: 97816737120125

Year of Publication: 2022

Price: £9.99(paperback) pp 254



In this blog, I’ll be reviewing Michael Denton’s new book, The Miracle of Man: The Fine Tuning of Nature for Human Existence.


Tune in soon for full details………….


De Fideli.

Book Review: Return of the God Hypothesis by Stephen C. Meyer.

A Work first Published in Touchstone Magazine March/April 2022



Return of the God Hypothesis: Three Scientific Discoveries That Reveal the Mind Behind the Universe

by Stephen C. Meyer

HarperOne, 2021

(576 pages, $29.99, hardcover)



Return of the God Hypothesis is the latest work from the distinguished philosopher of science, Dr. Stephen C. Meyer, Director of the Center for Science and Culture at the Discovery Institute in Seattle, Washington, and one of the world’s leading proponents of intelligent design (ID). In it, Dr. Meyer shows that science at its most cutting edge has thoroughly vindicated those who have clung to a deeply held belief in a personal God who operates beyond space and time. From the earliest moments of the Big Bang, to the formation of the first living cells on earth, and on up to the present day, the extraordinary fine-tuning we observe in all realms of nature shows us that God has truly left his signature on the very large and the very small.

The thesis of this book is that modern scientific discoveries testify to the idea that a mind vastly superior to our own not only created the universe, but also purposefully arranged for it to have precisely the properties required for human life to exist and flourish. Meyer examines three seminal scientific discoveries to support his thesis: (1) that organisms contain biological information whose source cannot be merely physical or material; (2) that the laws of physics have been finely tuned to sustain life in general and human life in particular; and (3) that the universe had a specific beginning in space and time.

Building on his previous best-selling works, Signature in the Cell and Darwin’s Doubt, which examined the implications of biological information, Meyer now brings cosmic fine tuning and the origination of the universe in a Hot Big Bang singularity into the discussion to argue persuasively that the single best explanation for all three phenomena is a personal God who transcends the spacetime continuum and has intervened throughout cosmic history to ensure that creatures shaped in his image would one day appear on earth.


Theistic Cosmology: The Big Bang

These three ideas were not birthed in a vacuum. The scientific revolution, Meyer asserts, began in Reformation Europe and was firmly moored in theistic principles. Quite simply, to study the universe was to get to know the mind of God. That’s why so many of the founding fathers of science—Robert Boyle, Isaac Newton, Johannes Kepler, and René Descartes, to name but a few—framed their scientific knowledge in terms of “understanding God’s thoughts after him.” They all saw within the pages of Scripture a God who set boundaries for the tides and the winds and ordained the orderly motion of the moon, stars, and planets, a law-giving God who limits human life span to curtail the spread of personal evil within any individual.

But as the Renaissance gave way to the Age of Enlightenment, scientists abandoned these theistic principles and sought instead to formulate a purely materialistic narrative of cosmogenesis. The great celestial mechanician, Pierre-Simon Laplace, declared in the eighteenth century that there was no need to invoke a deity to explain the complex motions of the celestial bodies, and Charles Darwin posited in the nineteenth that humans evolved from lower animals through a mindless process he called evolution. The late nineteenth and early twentieth centuries saw scientific materialism reach its zenith and even spill over into political and psychological discourse in the works of such atheists as Karl Marx and Sigmund Freud.

Yet with the inexorable march of science into the twentieth century, theism came back with a vengeance, starting with Edwin P. Hubble’s discovery that the universe was constantly expanding. This was followed by Georges Lemaitre’s discovery of evidence for a sigular cosmic event which brought the physical world—space, time, matter, and energy—into existence all at once at a particular point in the finite past. Lemaitre’s theory—for he was both a Catholic priest and a prominent physicist—came to be known as the Big Bang theory.

Meyer relates how many of the great astronomical minds of the era found such origin stories “philosophically repugnant” and went to great lengths to repudiate them. In fact, the distinguished British astrophysicist Sir Fred Hoyle coined the phrase “Big Bang” as a term of derision. He countered the idea of the universe having a definite beginning with his own “steady state” theory of a universe that was infinitely old. This was the conservative view among scientific materialists at the time.

But as militant as Hoyle became in advancing his steady-state cosmology, the evidence for the Big Bang grew ever stronger as the twentieth century wore on. And some distinguished scientists, such as the Mount Wilson astronomer Allan Sandage, began to see the unavoidably theistic implications of a universe that had a beginning. Ultimately, the evidence for the Big Bang theory led Sandage to faith in Christ at the end of his life.

Theistic Biochemistry: Genetic Information

In exploring the current state of origin-of-life research, Meyer shows that despite the best attempts of materialist scientists to re-create the first chemical steps toward life, they have been unable to do so, but in the process have inadvertently shown that an inordinate amount of intelligent design—far in excess of current human capability—is required to bring a living organism into existence. Indeed, by calling on experts in organic chemistry, Meyer shows that even the first steps toward creating a biomolecular assemblage require many intervening stages that cannot be achieved naturalistically. He writes:

The discovery of the functional digital information in DNA and RNA molecules in even the simplest living cells provides strong grounds for inferring that intelligence played a role in the origin of the information necessary to produce the first living organism.

The thorny question of life’s origin leads Meyer to explore an even more fundamental problem for scientists who hold to a strictly materialistic narrative of how we got here. He doesn’t shy away from asking where the stupendous amounts of new genetic information came from that are needed to build complex cells and new body plans. He shows that even the most hard-nosed evolutionary biologists duck that question time and time again because no rational answer is in sight.


Theistic Physics: Fine Tuning

Moreover, it turns out that we live in precisely the kind of universe that can allow living things to exist in the first place, not to mention allowing human life to flourish. Specifically, if the strengths of the various forces of nature or the properties of the particles comprising the material universe were only very slightly different, we simply wouldn’t exist at all. This is known as the fine-tuning problem. Meyer reminds us that some of the best minds in the industry have been thinking deeply about it.

The distinguished theoretical physicist Sir John Polkinghorne believes that cosmic fine-tuning provides very powerful evidence of design. Brian Josephson, another British Nobel Prize-winning physicist, has stated frankly that he is 80 percent confident that some kind of intelligent agency was involved in the creation of life. The same evidence caused the outspoken philosopher Antony Flew to reject his own long-time atheistic teachings, which he had clung to for most of his life, in favor of deism. As Christian astronomer Luke Barnes writes: “Fine tuning suggests that, at the deepest level that physics has reached, the universe is well put together. . . . The whole system seems well thought out, something that someone planned and created.”

Nevertheless, some materialist physicists have invoked an entirely speculative concept to explain away the creation of our fine-tuned universe: namely, the weird and wonderful “multiverse,” or as some refer to it, the “many worlds hypothesis.” Our universe appears the way it is, these advocates claim, because it is just one among an infinite number of universes whose physical laws and material properties are all different. Logic dictates that a small number of these universes must contain conditions that are ripe for the development of life and human intelligence, and ours just happens to be one of them. No creator God needed.

Meyer calls upon some towering figures in the philosophy of physics to demolish the multiverse hypothesis. Roger Gordon, for instance, has compared the attempt to promote the multiverse theory to “trying to dig the Grand Canyon to fill in a pothole.” Other intellectuals have delivered their own verdicts on the many-worlds interpretation of quantum mechanics. Richard Swinburne of Oxford University likes to invoke Occam’s Razor in deciding whether a theistic or multiverse worldview is more likely. Since theistic beliefs require only one explanatory entity, he argues, over the multitude of entities required for the multiverse, the theistic model is more rational and more likely to be true.


Cosmic Gerrymandering

Desperate attempts have also been made by influential cosmologists to avoid the obvious theistic implications of a universe that had a definite beginning. In particular, Meyer uses his considerable skills in philosophy to debunk the lofty-sounding proclamations of celebrity cosmologists such as Lawrence Krauss, the late Stephen Hawking, and others, who have sold millions of books with headline-grabbing titles like A Universe from Nothing and The Grand Design.

Meyer also examines the technical details of the real physics underlying their claims. For example, he notes that Hawking ducks the issue of a beginning by introducing “imaginary time” into the equations of general relativity. While these modifications do seem to avoid a singularity, his critics have pointed out that they are merely mathematical constructs that do not comport with physical reality. Hawking also introduces ad hoc treatments that appear simply to have been motivated by his philosophic disliking of a first cause.

Meyer lays out similar devastating arguments against other theorists who have waded in on this issue, especially Lawrence Krauss and Max Tegmark. Above all, Meyer shows that while these men may be brilliant scientists, they turn out to be very poor philosophers.


If God, Which God?

If, as Meyer asserts, the God hypothesis is the single best explanation for why the universe is the way it is, can we then infer anything about the nature of that deity? Meyer discusses the three main possibilities: pantheism, deism, and theism.

Pantheism asserts that God is the totality of all of nature, the Brahman of the Eastern religions. Meyer shows that pantheism cannot account for the cosmic fine-tuning we observe, because the deity that created the universe must necessarily transcend space and time. All the great religious texts of the Orient, however, describe a deity who must have begun to exist only after the universe came into existence.

Deism, on the other hand, posits a transcendent God, but it denies any involvement of that God in the workings of nature after the beginning. In other words, God somehow front-loaded the laws of nature so as to guarantee that creatures like us would some day emerge, but he then stepped back and let things proceed on their own.

The actual scientific evidence we have, however, indicates that God has played an active role in his creation throughout time. For example, vast amounts of new information had to have been introduced when the first complex animal body plans appeared during the Cambrian Explosion, some half-billion years ago. The fossil record shows clear evidence of mass extinctions followed rapidly by the appearance of entirely novel forms of life. That comports with a God who is always working, as the Lord Jesus said: “My Father is always at his work to this very day, and I, too, am working” (John 5:17).

Although Meyer concentrates on just three issues in this book—fine tuning, the origin of biological information, and the singularity at the beginning of time—there are other natural phenomena that also point towards a creator God. The hard problem of consciousness, for example, is still a profound mystery, especially for those who hold to a materialistic or evolutionary world view, yet it fits neatly into a theistic framework.

Can scientific research go a step further and trace a path from theism to Jesus Christ? While Meyer is a Christian, he does not address that question in this book, at least not directly. Perhaps that discussion will become part of Meyer’s next literary project. If so, it will certainly be worth reading, too!

Dr. Neil English is busy writing his latest book, Choosing Binoculars: A Guide for Stargazers, Birders and Outdoor Enthusiasts, which will hit the bookshelves in late 2023.


De Fideli.

Product Review: Opticron Adventurer T WP 6.5 x 32.

The Opticron Adventurer T WP 6.5 x 32.

A Work Commenced June 12 2022





Product: Opticron Adventurer T WP 6.5 x 32

Country of Manufacture: China

Chassis Material: Rubberised Aluminium & Polycarbonate 

Exit Pupil: 4.9mm

Eye Relief: 18mm

Field of View: 161m@1000m(9.2 angular degrees)

Coatings: Fully Multicoated on all glass surfaces

Prisms: Porro BAK4

ED Glass: No

Close Focus: 3m advertised, 2.56m measured

Dioptre Compensation: +/- 4.0

Waterproof: Yes

Nitrogen Purged: No

Tripod Mountable: Yes

Accessories: tetherable rubber objective lens caps, ocular caps, padded neck strap, soft carrying case, microfibre lens cleaning cloth, warranty card & instruction manual.

Weight: 549g advertised, 556g measured

Warranty: 2 Years

Dimensions LxWxD (cm): 10.9 x 16.9 x 5.0

Price(UK): £65.21


Recently I put the Opticron Adventurer T WP 8 x 32 through its paces. This neat little porro prism binocular greatly exceeded my expectations, based on its excellent price to performance ratio. But I was keen also to test drive its lower power sibling, the Opticron Adventurer T WP 6.5 x 32. So I ordered up a unit from Amazon and spent a couple of weeks using it in a variety of environments. Since many of the basic features on both the 8 x 32 and the 6.5 x 32 are identical, it provided a good opportunity to investigate a phenomenon known as depth of field, and the factors which might govern its behaviour, which I shall elaborate on shortly. For now, I want to briefly summarise my findings of the 6.5 x 32 in relation to the 8x glass in the same series.

The Opticron Adventurer T WP 8 x 32 (top) compared with the 6.5 x 32 (bottom).

Like the 8 x 32 model, the 6.5x glass showed excellent control of internal reflections, diffused light and diffraction spikes(i.e. none seen). It was extremely clean, as judged by my Iphone 7 torch test.

Collimation was good as tested under the stars and also by checking a horizontal electricity cable in the distance.

Having a look at the exit pupils, I noted only slight truncation in the left barrel, but in general, the results were very good:

Left exit pupil shows slight truncation.

Right exit pupil shows nice circular geometry.

The first big surprise for me was its much superior glare suppression compared with the 8 x 32 model. For some reason that still escapes me, the 6.5x produced noticeably higher contrast images than its 8x sibling. I can only surmise that newer coatings were applied to these units at some time. Veiling glare was also much better controlled in the 6.5x unit. Eye relief is good: I was able to image the entire field with my glasses by rolling down the rubber eyecups, but it’s a fairly tight squeeze!

Close focus was measured at just over 2.5m, considerably better than the advertised 3m setting. The 6.5 x 32 delivers a huge field of view – fully 9.2 angular degrees! The sweet spot is quite large too, remaining very sharp in the inner 60 per cent or so of the field .After that, mild field curvature sets in, becoming progressively more severe as one approaches the field edges. To my eye, about 75  per cent of the field was acceptably sharp, with more pronounced blurring occurring in the last 25 per cent before hitting the field stops. Sometimes I would notice a ‘fish bowl’ effect while panning large swathes of landscape. The image is very bright; noticeably brighter than the 8x glass in fact, especially in low light conditions, at and after sunset. Colour correction is excellent in the centre, but does show a bit of lateral colour as the eyes are moved off axis, but it was no more than I’ve seen in instruments costing ten times its retail cost. In terms of colour balance, I judged the image as quite neutral.

The image through the Adventurer T WP 6.5 x 32 is very stable and quite immersive. I can easily understand why an instrument like this would be ideal for a younger individual or an older observer wishing to minimise image shake while glassing. For me though, I felt the 6.5x lacked those little details I’ve come to pick up more easily in 8x and 10x instruments. In other words, it lacked a little bit of reach. But that’s an entirely personal judgement and your mileage may vary.

Depth of Field & Stereoptic Comparisons Between the 8 x 32 and 6.5 x 32 Models

Comparing the two instruments on an open landscape in bright sunlight, I judged the image plasticity(3D effect) to be noticeably more pronounced in the 8x model. This was in keeping with my previous study on stereopsis which can be seen in this link. Indeed, the only two factors which influence image plasticity are the IPD, the separation between the objectives and the magnification, increasing linearly as these variables increase.

The opposite was true when I made some depth of field measurements, that is, when focused at infinity, how close could I keep an object focused sharply in the foreground. Borrowing my son’s laser rangefinder, and being careful to only image objects in the centre of the field to avoid the spurious effects of field curvature creeping in at the bottom of the field(which gives the impression of tightening up the focus at closer ranges), I measured the close focus at infinity of the 6.5x glass to be 33.9 yards, while that of the 8x glass gave a result of 44 yards.

So depth of field increases as magnification decreases. The question remains though, how does magnification scale with this phenomenon? Does it vary inversely as the square root of magnification or the square of magnification, or is it just inverse to the magnification or some such? Do any other factors determine the outcome?

It would be nice to know.

This is a rather complex and interesting question for sure, but I did find a reliable source that could give me a head start. Way back in 2004, a German professor of computational physics, Dr Holger Merlitz, based at the Leibniz Institute for Polymer Research, Dresden, posted an interesting communication in Cloudynights Binocular forum, where he adopted a very interesting quantitative approach to this question. I will quote the relevant part here for interest:

Hello Jean-Charles,

Your results on DOF for a binocular is in agreement with whatever I was able to figure out so far. In fact, magnification and (effective) exit pupil appear to be the dominating parameters. Here, ‘effective’ means the smaller of both, the observer’s eye-pupils and the exit pupil. I must admit that not all aspects are clear to me. The following approach to analyse this problem was suggested by Walter E. Schoen on a German discussion board:

The thin-lens equation

1/F = 1/G + 1/B

relates the distance of the object to be observed (G) with the focal length (F) and the distance of its image (B). A telescope is essentially made of two lenses, and the above relation is valid for both of them, the objective, and the ocular, for which we shall write

1/f = 1/b + 1/g

Now we assume that the binocular is focused to infinity. This means that the ocular is positioned in a way that the focal plane of the objective is on top of the focal plane of the ocular. Each object with large distance produces a sharp image in this particular plane, and the image ‘B’ of the objective coincides with the object ‘g’ of the ocular. Now we assume the object is coming closer. Its image ‘B’ is therefore shifting away from this plane, and since we keep the telescope focused on infinity, the ocular’s image ‘b’ of the ‘object ‘B’ becomes unsharp. One approach is to calculate the distance, to which the eye has to focus in order to get this image ‘b’ back into focus. The reciprocal value of this distance is the diopter-value the eye has to accommodate. With some arithmetic, and using V = F/f (magnification) and f+F = g+B = distance between objective and ocular one can obtain

b = G/Vˆ2 – f – f/V

(actually, when I tried to verify this relation, I got the opposite sign, but, being no professional, I may have messed up some conventions used for optical computations).

The result he got seemed to suggest that the main factor determining depth of field is indeed magnification. However, Dr Merlitz didn’t flesh out the details of how he arrived at this result.

Trust but verify.

So I had a go this afternoon and was able to derive the same formula, the details of which are reproduced below in my own handwriting:



So the result appears to indicate that depth of field in binoculars scales as 1/v^2, and this appears to be the predominant factor determining this effect. Incidentally, it also agrees with the findings in an article published on binoculars on Wikipedia, though no reference is given, and I always take such sources with a pinch of salt:

With increasing magnification the depth of field – the distance between the nearest and the farthest objects that are in acceptably sharp focus in an image – decreases. The depth of field reduces quadratic with the magnification, so compared to 7× binoculars, 10× binoculars offer about half (7² ÷ 10² = 0.49) the depth of field. However, not related to the binoculars optical system, the user perceived practical depth of field or depth of acceptable view performance is also dependent on the accommodation ability (accommodation ability varies from person to person and decreases significantly with age) and light conditions dependent effective pupil size or diameter of the user’s eyes.


Thus, the increase in the depth of field of the 6.5x glass compared with the 8x instrument should be about 8^2/6.5^2 or 1.51. Comparing this result to the numbers I measured, I get 44^2/33.9^2 = 1.68.

Not bad at all!

Of course, other inter-individual factors may also contribute to greater or less perceived depth of field, when two different binoculars of the same magnification are employed, such as accommodation, field curvature, or the size of the exit pupil etc.

Conclusions & Recommendations

The Opticron Adventurer T WP 6.5 x 32 is an excellent bargain for the rock bottom price paid. In keeping with the results reported by the reviewer showcased in the preamble above, it performs very well indeed, and should delight the owner with sharp, contrast-rich details in a very impressive and immersive field of view. Its minimum IPD of 53mm will make it especially attractive to those who have smaller faces, and the ultra-stable views at 6.5x will likely delight individuals who suffer from significant handshake.

Highly Recommended!


Dr Neil English is the author of seven books in amateur and professional astronomy. His 8th title, Choosing Binoculars: A Guide for Stargazers, Birders and Outdoor Enthusiasts, will be published sometime in late 2023 by Springer Nature.


De Fideli.

Product Review: Opticron SR.GA 8 x 32.

A Work Commenced May 23 2022



Product: Opticron SR.GA 8 x 32

Country of Origin: Japan

Ext Pupil: 4mm

Eye Relief: 13mm

Field of View: 145m@1000m(8.25 angular degrees)

Chassis: Rubber armoured Aluminium & Polycarbonate 

Dioptre Compensation: +/- 5.5

IPD Range: 58-72mm

Close focus: 3.7m advertised, 2.84m measured

Prism: Porro BAK4

Coatings: Proprietary  ‘N’ ty differential multi-coating

ED Glass: No

Waterproof: No

Nitrogen Purging: No

Weight: 543g

Dimensions L/W: 10.1×16.0cm

Accessories: Ocular & objective lens covers, rain guard, soft leather carry case, padded logoed neck strap, instruction manual and warranty card

Warranty: 30 years

Retail Price: £199(UK) $315(US)


As I write these words in May 2022, it’s getting very difficult to source good-quality porro prism binoculars, especially in the smaller, compact sizes. Over the last few decades aggressive marketing has promoted the roof prism binocular with all its innovations, but with ever increasing price tags. That’s the road I largely followed in my exploration of the binocular market, until I decided to check out a number of  porro designs from companies like Nikon and Opticron, who maintained several high-end models worth checking out. As I explained in previous blogs, it takes a lot of effort to create a roof prism binocular that can even approach the optical performance of good quality porro prism models. In this review, I’ll be demonstrating this proof of concept, by putting Opticron’s Japanese-made SR.GA 8 x 32 binocular through its paces.

Sourcing the Binocular

Perusing the Opticron UK website, I came across details about the SR.GA  8 x 32 model. Featuring a whole host of attractive features, including state-of-the art Japanese porro prim optics, a well made chassis and rubber armouring, all for an attractive retail price of £200. Incidentally, it’s available in the US for a retail price of about $315, but was discontinued as of May 2022. I contacted a member of the sales team at Opticron, Luton, and they were able to ship me out a unit. I was very excited when the package finally arrived, double boxed, with everything packed away well. What I received was the binocular inside an attractive, black leather case, together with a nice selection of high quality accessories, including a logoed neoprene neck strap, objective and ocular lens covers, a rain guard, a microfibre lens cleaning cloth, instruction manual and that all-important 30 year warranty(in the US it’s supplied with a Premier Plus Limited Lifetime warranty).

The Opticron SR.GA 8x 32 package.

Common Ancestry

The reader will note that at one time four SR.GA models were being offered by Opticron: 8 x 32, 7 x 42, 8 x 42 and 10 x 42. The larger models appear to be discontinued and I was informed that they only had limited numbers of the 8 x 32 model available. Opticron state that these were updated versions of their earlier HR models, but I also found a source claiming that the SR.GA 8 x 32 in particular is optically identical to another model which just pre-dated the HRs, that is, the Dioptron 8 x 32. Here is the source of that information dated June 2018:

Many years ago I bought a pair of Opticron 8 x 32 Dioptron binoculars. These served me well for many years until I was seduced by the lure of roof prisms and sold them – a decision I have regretted ever since. Don’t get me wrong; I love the easy handling quality and balance of my 8 x 42 roof prisms, but I have missed being able to carry a small porro prism binocular that could be slipped into a jacket pocket.
The SR.GA is a direct descendant of the Dioptron. In fact, Opticron told me that the optics and mechanical elements are exactly the same. What has been added is better multi coating of the optical elements and the rubber armour on the outside. The result is a beautifully made (still in Japan), chunky little binocular that performs as well as a modern roof prism at three times the price.
It has bright, natural colours and that 3 dimensional image you only get with a porro prism.I would agree with another reviewer that the image is sharp for about 80% of the field of view and I couldn’t detect any colour fringing when looking at back lit objects.
Negatives? Not great for using with spectacles, no waterproofing, strap is ok, but nothing special, and while the case is nicely made, it is too tight a fit if you want to quickly take out or put away the binoculars.
In summary, high quality porro prism binoculars are pretty rare these days and you wonder how long Opticron will continue to sell this range.

Source: Amazon UK

As it so happens, I recently acquired a mid-1990s Opticron Dioptron 8 x 32, and even described some of its features and operation in this previous blog. Let’s take a closer look.

Here you can see both instruments from above;


The Opticron SRGA 8x 32 (top) and the Dioptron 8x 32(bottom).

Both instruments have the same size field of view, that is, 8.25 angular degrees. Both are also Japanese made.

In the next picture, you can see that they have the same dimensions. The Dioptron is unarmoured, unlike the SR.GA.

The binoculars have the same dimensions as the picture above shows. The SR.GA is featured on the left, while the Dioptron is seen on the right.

I reasoned the rubber armouring would add a bit of weight, so I compared the two on a weighing scale. Sure enough, the Dioptron tipped the scales at 494g, while the SR.GA  weighed in at 543g.

The Amazon reviewer stated that the optics were identical in both models but the SR.GA had improved anti-reflection coatings. I can personally attest to these findings, as I’ve compared both in side by side tests.

In the next image, the coatings on the objectives of both binoculars are compared. The Dioptron shows a bright blue anti-reflection coating in normal daylight, while the more recent SR.GA shows much more subdued coatings, a good first sign that more light is being transmitted in the latter model.

The Dioptron(top) objective coatings reflect more light than those on the SR<GA(bottom).

Finally, you can clearly see the effects of adding the rubber armouring on the SR.GA compared with the unarmoured Dioptron. The latter is less well ‘padded out’ compared  with the former:

The armouring pads out the SR.GA (right) compared with the Dioptron(left).

And though there are small differences in the texture of the focus wheels in both instruments, I believe they are built round the same mechanism. The eyepieces are also pretty much identical in both models. In sum then, I think it’s a good bet that the SR.GA is indeed an updated version of the Dioptron 8 x 32.


The SR.GA is a very finely made instrument. In the hands, it feels very solid, with the rubber armouring helping the user maintain an excellent grip. The oversized focus wheel is covered in fine rubber and is exceptionally fast, moving from close focus to just beyond infinity in less than half a turn(actually about 160 degrees). Some super fast focusers make it easy to overshoot by accident, moving past the ideal focus position too easily. This is never a problem with the SR.GA 8 x 32 though; the gearing and tension is just perfect for high speed focusing. There is no backlash or free play either. In short, this is one of the nicest focusers I have had the pleasure of using in a binocular in this size class!

The dioptre compensation ring is located under the right ocular. It’s adjusted by rotating it slowly clockwise or anti-clockwise. It’s not quite as well tensioned as the Nikon E II 8 x 30 I recently showcased, and, as a result, it does tend to wander a wee bit in field use. This can be easily remedied by wrapping a small elastic band round the ring. For me, I just remember my preferred position and make slight adjustments every now and then when required.

The eye relief on all these classic, compact porros is poor, it has to be said. It has a value of just 13mm on this model. That’s not an issue for me, as I don’t wear eyeglasses while using binoculars but those who must wear eyeglasses will find viewing the entire field problematic. I checked this by turning down the rubber eyecups. I could not image the outer part of the field while wearing eye glasses. Just like the Nikon E II, spectacle wearers will benefit from using more contoured glass lenses with high-index glass.

Just as the thick rubber armouring will help protect the instrument against knocks and light rain, the deeply recessed objective lenses also confer quite a bit of protection against aeolian-derived dust, rain and stray light.

The fully multi-coated  32mm objectives are deeply recessed to protect them from dust, rain and stray light.

All in, this a very delightful instrument and a real joy to use.

Optical Assessment: 

As always, I began my optical testing of the Opticron SR.GA 8 x 32 by turning my IPhone 7 torch up to its brightest setting and examining the images as seen visually from across my living room. The results were good. There were no diffraction spikes and only a few slight internal reflections in evidence, with only a trace of diffused light observed around the light source. Compared with the older Dioptron 8 x 32, it was a far cleaner result. Later, I turned the binocular on a bright, yellow sodium street lamp and did manage to detect some very weak internal reflections. In this capacity, it was a notch down from the excellent Nikon E II porro prism binocular previously tested.  Turning to a bright gibbous Moon low in the southeast, I was pleased to see that these internal reflections were quite well subdued. This will be a good instrument to follow the phases of the Moon with, and for observing cityscapes at night.

My next test was to photograph the light emerging from the exit pupil in both binocular barrels.

As you can see, the pupils are round and untruncated, with little in the way of light leaks around them.

Right exit pupil.

Left exit pupil.

Testing under the stars showed the binocular to be very accurately collimated. Just focus on a bright star like Vega, and defocus the right barrel image using the dioptre ring. The focused right barrel image of the star was seen very near the centre of the de-focused anulus, indicating very good alignment. I detected a modest drop in illumination as a bright gibbous Moon was moved from the centre of the field to the extreme edge, but all within design tolerances.

The  Opticron SR.GA 8 x 32 serves up a really good image during all daylight conditions. It’s bright, with excellent sharpness across about 70 per cent of its very large field(8.25 angular degrees). The outer 30 per cent of the field shows progressively more field curvature and pincushion distortion, but not to the extent that it is distracting. Contrast is excellent, as is colour saturation. I found comparing it to the older Dioptron model to be eye opening(excuse the pun). The latter image was quite yellow and less bright in comparison to the much more neutral colours served up by the SR.GA. This probably indicates that its light transmission curve as a function of visual wavelength is flatter and brighter in comparison with the Dioptron. The other thing that was noticeably improved was glare suppression while looking near a setting Sun. The SR.GA  was far superior to the Dioptron in this regard, and the same was true when testing for veiling glare. That said, the SR.GA was not quite as good as the Nikon E II 8 x 30 in similar, side-by-side tests.

Colour correction is excellent: I detected none on axis and only a trace when examining high contrast objects, like a telephone pole set against a bright, leaden sky.

As I’ve come to expect from a high-quality porro prism binocular like this, the instrument manifests vivid 3D images of the landscape over short and medium distances. Like the superlative Nikon E II I recently showcased, there is very much a sense of ‘focus and forget,’ especially when trained on targets beyond about 30m or so. I measured its close focus- 2.84m – to be significantly better than the advertised 3.7m. Just like the Nikon E II, scanning large swathes of landscape with this instrument is supremely comfortable, with no blackouts to mention and no rolling ball effect.

Serious fun

As a stargazing binocular, I enjoyed lying out on a recliner in my back garden in the wee small hours of an early May morning, scanning the summer Milky Way through Cygnus. Stars show up as lovely pinpoints of light across most of its expansive field, against a dark sky background. Though not the best instrument for binocular stargazing, it still showed me pretty views of the Coat Hanger asterism in Vulpecula, the great globular cluster M 13 in Hercules, and some lovely views of the colour contrast binocular double O^1 Cygni. This will make a rather good instrument for enjoying the up-and-coming Perseid meteor shower when truly dark skies return to our shores in early August. It has also presented some lovely, high-contrast images of the crescent Moon and earthshine, as well as tack-sharp images of crater fields and the lunar maria.

In summary, this will make an excellent general purpose instrument for my needs. Though it’s not waterproof, it’s most certainly a tough little binocular, and ergonomically is very easy and intuitive to use. I have already enjoyed many hours with this instrument, surveying the hills around my home, exploring woods and forests, rivers and ponds, and also for scanning trees and bushes for small, passerine birds.

Comparisons Between the SR.GA and the Nikon E II

One might legitimately ask why one would use the SR.GA in preference to the Nikon E II and vice versa? Optically, the reader might be surprised to learn that the views are much more similar than they are different. Both instruments have excellent central sharpness with nice big sweet spots. Both have excellent colour correction and very similar colour tones. Both have really good control of glare. If I were to nail it down, I’d just say that optically, the Nikon E II does everything that little bit better than the SR.GA. But optics are only half the story. I prefer the handling on the SR.GA. It just fits my hands that little bit more securely. I favour the super-fast and precise focuser on the SR.GA  over that accompanying the Nikon E II. Indeed, I think the Opticron makes for a better birding binocular than the Nikon for this very reason. The SR.GA also has better ‘hang’ than the E II, meaning that it sits more flatly against my chest than the Nikon wonder bino.

So, for me, it’s not really a question about which instrument I prefer. I’m a little old-fashioned and just a little bit sentimental. A cursory perusal of the literature of 20th century birders and naturalists, shows the 8 x 30 emerging as a spiriting gestalt, connecting very different people in very different circumstances, across the fields and the years. So, I count myself extremely lucky to own both and hope to use the SR.GA pretty much routinely, while the Nikon E II will be reserved for more special occasions, when the mood takes me. Indeed, I hope to write extensively about my experiences with both these neoclassical porro-prism beauties in future blogs and elsewhere…….

A Note on Storing the Instrument

Having a small, air- and watertight tub filled with desiccant is a great way to store your porros from day to day. The instrument is just placed inside the tub without any caps on so that it can be picked up and out in a matter of seconds.

While the case that accompanies the SR.GA is very nicely made, it’s a bit of a squeeze to get the instrument into and out of, especially if I want to be out the door fast. I’ve thus decided to store both my compact porros in small air-and water-tight plastic tubs. Lining the inside with a plastic bag, I have also included several sachets of activated silica gel. By activated, I mean the sachets are placed in a low power setting of a microwave oven for several minutes to drive off the absorbed water from the silica gel pellets. When the blue coloured crystals turn orange-green, you’re good to go. I’m also in the early stages of experimenting with a possible fungicide; camphor, which has well established fungus killing properties. I think the instruments might well benefit from a ‘camphor bath’ every few months or so for 7 to 10 days to curtail any fungal growth which may set in over the long term. For travel and vacation though, the black leather Opticron carry case should serve me fine.


It’s a great pity that quality, Japanese-made porros like these are becoming as rare as hens’ teeth. I for one have been won over by their optical and ergonomic charms and would heartily recommend them to anyone. And while great roof prism binoculars will always have their place, the world is big enough for both families. In this capacity, I have submitted a proposal to pen a brand-new literary work – Choosing & Using Binoculars –  showcasing the many and varied binoculars now available on the world’s stage, a work that will help as many people as possible make good, informed decisions on choosing and using the right model for their intended purposes. There will be plenty in it for everyone: birders, hikers, general nature enthusiasts, mariners and astronomers….and for all budgets. The proposal has now been approved and will be published as a fully-illustrated, stand-alone text by Springer Nature in late 2023.


I hope you will support the author in this project.


Thanks for reading!



De Fideli.


Product Review: Nikon E II 8 x 30.

The Nikon EII 8 x 30.

A Work Commenced May 14 2021


Preamble 1

Preamble 2

Preamble 3


Product: Nikon E II 8 x 30

Country of Origin: Japan

Chassis: Die Cast Magnesium Alloy 

Exit Pupil: 3.75mm

Field of View: 154m@1000m(8.8 angular degrees)

Dioptre Compensation: +/- 4

Coatings: Fully Broadband Multicoated

Prisms: Porro BAK4

Close Focus: 3m advertised, 1.96m measured

Eye Relief: 13.8mm

Waterproof: No

Nitrogen Purged: No

ED Glass: No

Weight: 575g

Dimensions L x W: 18.1 x 10.1cm

Accessories: Padded logoed neck strap, objective covers, rain guard, soft leather case, instruction manual, warranty card

European Warranty:10 Years

Retail Price: £579.99(UK)



The Japanese optics frim, Nikon, needs to introduction. For over a century, they have delighted a loyal fan base of enthusiasts with their photographic and optical innovations. Thankfully, for us binocular enthusiasts, a small part of their business is still devoted to bringing high quality instruments to the market to suit virtually everyone’s budget. In past reviews, I’ve showcased some of their better wares, such as the top-rated Nikon Monarch HG 8 x 30 roof prism binocular. But Nikon also enjoys a long tradition of manufacturing high-quality, classic porro prism binoculars and in this review, I’ll be giving my opinion on its flagship model, the Nikon E II 8 x 30.

Introduced back in 1999, the Nikon EII is offered in two models, an 8 x 30 and a larger 10 x 35. What distinguishes these units from their lower-priced econo-models are their state-of-the-art optics, very large fields of view and exceptional build quality. As you may have guessed, this kind of quality doesn’t come cheap, but I hope you’ll agree that they still represent exceptional value for money, especially when you factor in how much an equivalent roof model would cost to even approach the quality of these amazing porro prism instruments. So if you’re in any doubt about my verdict on the 8 x 30, it gets my top recommendation. What follows here are detailed notes on its ergonomics, optics and handling in the field.

The Package

The box containing the instrument looks seriously plain Jane; just simple, brown carboard. But when you prize it open, you get a very fetching soft leather case containing the instrument. All the paper documentation, including a multi-language instruction manual, warranty details etc are found at the bottom of the box. The binocular comes with a Nikon logoed plastic rain guard, and loosely fitting plastic objective covers. The high quality neck strap appears to be made from woven cotton and has a matching logo inscribed, “Nikon since 1917.”

The Nikon E II 8 x 30 package.

Binocular Ergonomics

The Nikon E II 8 x 30 is exceptionally easy to hold in my medium sized hands. It’s also very lightweight, tipping the scales at just over half a kilo.  The fit and finish is excellent, with a strong retro look, though it must be pointed out that the instrument is not rubber armoured. I suspect that this was avoided to maximise the aesthetic appeal of the binocular in order to make it look and feel like a true classic glass. Indeed, I seem to have garnered similar ideas about the Nikon Monarch HG 8 x 30; it too is lightly armoured for maximum aesthetic effect.

The dioptre setting is found under the right ocular. It moves with a fair amount of friction and holds its position very well, even after weeks of daily use.

Unlike many other classic porro prism binoculars of the past, the dioptre ring on the Nikon E II is very firm and moves only with a fair amount of torque.

The focus wheel works very smoothly, with zero play or backlash. It goes through just shy of 1.5 revolutions from one end of its focus travel to another. At times it can be challenging changing focus, from very near to very far, but in practice, once an object is located in the middle distance, only very slight adjustments are required to keep the image razor sharp all the way out to infinity.

The eyecups are made of soft rubber that seem very durable. The ocular filed lens diameter is good and large – 20mm. The cups can be folded down to accommodate eye glass wearers. Though I don’t personally wear eye glasses while glassing, I did test to see if I could see the entire field with my eyeglasses on. I can report that it could just be done, but I didn’t find the experience particularly comfortable. Those of you who must wear eye glasses would benefit from wearing more contoured spectacles with high-index glass.

The Nikon E II has rubberised eyecups that can be folded down to accommodate eye glass wearers.

The serial number of my unit is 822128, indicating a fairly recent manufacture. There has been some discussion about whether or not the anti-reflection coatings on the Nikon E II series have been improved over the years. Given Nikon’s tendency to improve their products without formal notification, I don’t see why they haven’t been modified since launching the product back in 1999.

The unit has been recently manufactured based on the serial numbering.

The ocular field lenses are large and easy to square one’s eyes up with. They are multi-coated as seen from above:

Note the large ocular field lenses, some 20mm in diameter.

The objectives are reasonably well recessed and have a beautiful magenta hue in daylight.

The beautiful and uniformly applied anti-reflection coatings on the objective lens.


A Curious Aside:

3D Perception Differences Between Roof and Porro Prism Binoculars

Careful observers have noted a more enhanced 3D(image plasticity) effect using porro prism binoculars. Is there a basis for this effect in reality? Yes, indeed there is. To see how, read on.

Suppose we are imaging two objects along the same line of sight; one located at a distance of 10m say, and another located at 15m, as illustrated in the figure below, only with greatly exaggerated angles for the sake of clarity

For a roof prism binocular, assume that the distance between the centres of the objectives is the same as the inter-pupillary distance which is ~6.5cm (0.065m) for my eyes, so half this length, 0.0325m, represents x in the diagram above.


Using simple trigonometry, at 10m distance the half angle B subtended by the object in the roof prism binocular is given by

Arctan(0.0325/10) = 0.186 degrees or 11.2’

Similarly, the object located at 15m will subtend a half angle A given by

Arctan(0.0325/15) = 0.124 degrees or 7.4’

Therefore, the image plasticity is provided by the angular separation B-A = 3.8’


Next consider the same scenario for a porro prism binocular, just like the Nikon E II, with a spacing between the objective centres measured at ~12.5cm, so x increases to 0.0625m


At 10m distance angle B is given by Arctan(0.0625/10) = 0.36 degrees or 21.5’  and angle A is given by Arctan (0.0625/15) = 0.24 degrees or 14.3’

Therefore, the angular separation(Image plasticity), B-A, for the porro prism binocular is 21.5 – 14.3 = 7.2’

Thus, without considering magnification, the porro will show a much more discernible spatial difference between the objects than an equivalent roof prism model.

Notes: The more widely set one’s eyes are the greater the 3D effect manifested. So those who enjoy a wider IPD will experience this better.

The wider the separation of the objectives in the porro prism binocular, the greater the 3D effect. I would thus expect a typical 7 x 50 porro to give even more pronounced image plasticity than a little 8 x 30.

The reader will also note that as the distance to both objects is increased, the differences between the roof prism binocular and the porro will diminish. For example, similar calculations show that the same objects located at 60 and 65m, respectively, would have an angular separation of only 0.15’ in the roof prism binocular and 0.3’ in the porro prism counterpart. Since the limit of resolution of the human eye is about 1 arc minute, the differences here will be all but indistinguishable. So, we can conclude that the 3D effects of porro prism binoculars work optimally at middle distances, and all but vanish at larger distances.

The above discussion did not consider the role of magnification though. The key point here is that the binocular will magnify those small angular differences and so help the eyes to spatially distinguish the objects better. So, for example, two objects at a distance of 190m and 200m will subtend an angular separation of 9.1′ and 8.6′, respectively in an 8x glass. The difference is about 0.5′, which is just on the cusp of discernibility under ideal conditions. The same result at 10x gives 0.6′; only a trifle better. So we may conclude that this 3D phenomenon all but vanishes in the Nikon E II 8 x 30 beyond about 200m distance.


Optical Assessment: 

I began my optical tests by shining a bright white light source through the binocular and examining the visual image produced. The result was excellent; there were no annoying internal reflections, diffraction spikes or diffused light around the light source, showing that the anti-reflection coatings were performing well and that the glass was very homogeneous. This was confirmed after dark by looking at a bright yellow sodium street lamp. The image was clean and nicely contrasted with no internal reflections. Indeed, porro prism models do not produce diffraction spikes unlike some premium roof prism models.

Next I examined the exit pupils of both barrels of the Nikon E II. Below are images taken of the left and right pupils.

Left exit pupil.

Right exit pupil.

The pupils look nice and round, with little in the way of extraneous stray light encroaching on them. The reader can make out some weak reflections from the prisms quite a bit away from the pupils and so will have minimal effect on the views.

The images served up by the Nikon EII are outstanding! But to elaborate; the enormous 8.8 degree field of view produces a stunningly beautiful and uniquely immersive image. Sharpness is superb almost to the edge of the field and then, only mild field curvature and a bit of pincushion distortion creeps in to slightly distort the image. The field is so large that it makes the Nikon Monarch HG 8 x 30 field seem small in comparison lol. Colour correction is excellent: I detected none on axis and only the merest trace of lateral colour observed under the most pressing of observing conditions, such as viewing layers of tree branches against a bright overcast sky. By the way, it achieves these stunning optics entirely without low dispersion(ED) glass, just like the highly lauded Swarovski Habicht porros.

Colour rendition is very natural and true to life. Glare is also very well suppressed in this instrument, including annoying veiling glare that sometimes shows up in other binoculars when viewing in the open air when bright sunlight is streaming down on your target. Brightness is also very satisfactory, even while viewing objects in the late evening. As the guys from allbinos measured back in 2015, it achieves a light transmission of the order of at least 90 per cent, but its very neutral colour cast indicates that the transmission graph is bound to be quite flat over much of the visual spectral range(410-700nm).

I measured close focus on my unit to be just 1.97m, well below the advertised 3m and fully in keeping with the majority of roof prism models. This came as a genuine surprise to me, as porro prism binoculars are not known for their good close focus. Of course, to get the most out of those close up views, I found it necessary to reduce the IPD of the instrument to mimic the natural ‘crossing of the eyes’ that happens as an object is placed very close to the body.

As discussed above, the 3D images served up by this porro prism binocular will knock your socks off! I enjoyed countless minutes over the last month glassing open fields, watching Jacob’s sheep and their beautiful new-born lambs enjoying the warm spring sunshine, and admiring the finest details on their black, brown and white fleece. The instrument also has excellent focus depth so only slight refocussing is required to see everything super clear from about 30m all the way out to infinity. Your eyes become acutely aware of the topology of the landscape, as you view over hillocks and small depressions in the field. Mole hills transform into architectural wonders.

One of the great virtues of instruments such as this, is the significantly reduced amount of time you spend focussing and the increased time spent just observing! In a forest say, you focus once and, more or less, forget it! These special properties also make it the ideal binocular for viewing landscapes. I have been bowled over by the sheer amount of information each image relays to my eyes and the super large field helps reel in many unexpected visual trinkets. For example, one afternoon, I was admiring the gorgeous lime-green tint of the young leaves on a large horse chestnut tree some 50 yards away, only to watch in sheer amazement as a group of noisy Oystercatchers were captured flying across the valley in the deep background, some 300 yards distant. I could easily make out their long, ruddy beaks and black and white plumage as they raced through the air at breakneck speed. I have even learned to spot airborne Starlings and even the odd Jay in the same way, and over very long distances.  It’s the combination of excellent, glare-free optics, great focus depth, palpable 3D impression and class-beating field size, that creates the most powerful Majesty Factor I have personally experienced in any binocular, period.

Panning the edges of large swathes of forest is supremely comfortable with the Nikon E II 8 x 30. I have yet to experience any blackouts or the stomach-churning rolling ball effect I often experienced while observing with the Nikon Monarch HG 8 x 30. It’s also very well collimated.

Any niggles at all? Not really! OK, It’s not waterproof, and I would have liked to see some rubber armouring covering the chassis, but I guess that might put some folk off( yes, some folk care more about how a binocular looks than what it delivers optically, I kid you not!). I’ve recently acquired an excellent Opticron SR.GA 8 x 32 porro that does have this armouring, which will help protect it against the elements that little bit better. It too delivers very fine images, just a notch below those served up by the Nikon. But in all honesty, simple common sense is all that’s required to keep it safe from the worst of the weather and more careful attention to long-term storage of the binocular will help keep it in tip-top shape.

I plan to use the Opticron SR.GA for routine work, especially over the winter months and employ the Nikon E II only when conditions demand the very finest optics. That way, both will enjoy a long lease of life.

One in a million!

The Nikon E II is becoming more difficult to source. I note that several Nikon sites no longer advertise it. I received mine from Dutch stock, so I know they can still be found at reasonable prices. For sure, I’m very late to the party, but if you want to experience that superlative optical performance in a neo-classical compact porro design, now would be a good time to acquire one…………..before they’re all gone!



Happy Hunting & Thanks for Reading!




De Fideli.

A Closer Look at Two Compact Porro Classics.

The Carl Zeiss Jenoptem 8 x 30W(left) and the Opticron Dioptron 8 x 32(right).

A Work Commenced April 24 2022


I don’t suppose you’ve noticed, but I’ve taken rather a shine to a number of compact porro prism binoculars of late, having spent the vast majority of my time exploring roof prism models. After having test driven a few models now, I’m rather taken by their considerable charms, not least of which is their simple design, excellent optics, and much smaller price tags than similar quality roofs. Before I pulled the trigger on a few top rated models, I took some time to get a feel for a couple of classic models in the 8x 30/32mm aperture class. Accordingly, I bought up two models on the second-hand market for field testing; the Carl Zeiss Jenoptem 8 x 30 and the Opticron Dioptron 8 x 32, as shown above. In this short blog, I’d like to relate some details about these two models and how they perform after all these years.

I purchased both models from ebay. There were many Zeiss DDR Jenoptem models available for sale in all sorts of condition. That helps stabilise their market price to between about £60 and £100 UK. I settled on a late-1980s model(serial # 6722320), with the famous T3M multi-coatings, which, for their day, were well ahead of anything else on the market.  The unit I purchased was in excellent working condition, without any visible damage to the optics, and devoid of internal fungus infestations. The binocular came in its original brown leather case, which needs a few stitches to restore it to full working order, as well as a nice leather lanyard.

The c.1988 Carl Zeiss Jena Jenoptem 8x 30 ocular lenses with famous T3M multi-coating.

The objectives looked pristine after I gave them a thorough clean:

The well preserved anti-reflection coatings on the 30mm objectives. Note the serial number indicative of the era in which it was manufactured.

Some background research informed me that the leather case originally supplied with the instrument was lined in a fetching rose-coloured lining:

The original case, with its nice rose coloured lining.

The instrument arrived well collimated. The central focus wheel operated smoothly, with no free play or backlash. I was very impressed when I took my first look through it. The image was bright and very sharp within its very generous sweet spot. I was especially taken aback by the enormous field of view; fully 8.4 angular degrees! The dioptre compensation ring, located under the right ocular, moved smoothly but was easily nudged out of place.

Observing in an open field, in bright, spring daylight, showed that glare was quite well controlled but certainly more than I’ve seen in most modern instruments. Still, the sheer majesty factor of the field of view made a very deep impression on me. I was especially taken by the wonderful 3D pop to the images, which I found very engaging. As this instrument was more than 30 years old, I was expecting some internal reflections when I turned the instrument on a bright light source; and rest assured, a few did show up.

The instrument presented a very warm image but it was not as yellow as other reports have suggested. Maybe this was because I had a quite late model of this world famous binocular – I’m not entirely sure- but I was surprised to learn that its maximum light transmission peaked at about 91 per cent in the optimal, green-yellow visual range, according to spectrophotometric measurements conducted by Allbinos on a slightly earlier, 1985 model.

Short on eye relief though, but amazing if you manage to hook your eyes up with those ocular field lenses!

All in all, a very nicely operating classic compact porro, and quite collectible even in the 21st century. It certainly puts a smile on my face every time I use it.

The next model is a later dated instrument from the UK-founded Opticron optics firm. Called the Dioptron 8 x 32, it was fashioned in Japan and dates to the mid-1990s. Thus, it represents the next step in the intelligent design of the compact porro prism binocular. I picked this model up for just £50 plus shipping.

The Japanese-made(c.1995) Opticron Dioptron 8 x 32, together with its bonded leather carry case.

Though of slightly lower profile than the Zeiss Jenoptem, the Dioptron weighs roughly the same as its German counterpart, so its one chunky little glass.

Note the nice multi-coatings on the ocular lenses.

The Japanese origin of the Dioptron is betrayed by the stamp on the front of the binocular, which unscrews to allow it to be mated to a tripod:

Made in Japan.

The instrument also arrived well collimated, which flies in the face of those who insist that porro prism designs are much more susceptible to misalignment than their roof prism counterparts. If you mistreat any binocular, you’re in for trouble. But treat them well and they will serve you for a lifetime.

The objectives show a very prominent blue anti-reflection coating, unlike the prominent purple hue on the Jenoptem objectives.

The anti-reflection coatings on the mid 1990s Opticron Dioptron 8 x 32.

The big difference between the models is the focus wheel. In a departure to classic German compact binoculars, the Dioptron focus wheel is much larger and easier to access than that of the Jenoptem. Even after all these years, it works like a dream. Very high quality indeed!

Note the much larger and easier to access focus wheel on the Opticron Dioptron.

One slightly niggly thing about both instruments is the easily moved nature of the dioptre rings. Taking them in and out of their cases generally bumps the dioptre off its optimal setting, and even when holding them up to your eyes is quite enough contact to make them wander. Thankfully, this problem is all but fixed in later models.

Overall, the Dioptron is extremely easy to use, even though it shares the same poor eye relief with the Zeiss Jenoptem. Optically, it offers up a very good image, slightly better in fact than its German counterpart, but what genuinely surprised me was the strong colour cast of the images it serves up. It was considerably yellower than the older Zeiss glass. I would describe it as very ‘warm.’ And going from 8.4 angular degrees in the Zeiss down to 8.25 degrees in the Dioptron is quite noticeable to my eye. The Opticron does have noticeably better control of glare however, which renders its images that little bit more contrasted than the Jenoptem.

Both the Carl Zeiss Jenoptem and the Opticron Dioptron classics can be enjoyed entirely on their own terms. I’ve taken both instruments out on long walks in the countryside and have thoroughly enjoyed the lovely large fields of view and very large sweet spots, as well as the characteristic 3D pop they both command. The worst of the glare is seen when these instruments are pointed near bright light sources, but a lot of this can be removed simply by shading the objectives with your hands.

Both instruments helped me to finally make the transition to using high quality porros in preference to roof prism models when using compact binoculars in the field. The transition feels entirely natural for me.

After all, I’m a dyed-in-the-wool classicist don’t you know!

Thanks for reading!


De Fideli.

Product Review: Opticron Imagic TGA WP 8 x 32.

A Work Commenced April 13 2022



Product: Opticron Imagic TGA WP 8 x 32

Country of Manufacture: China

Chassis: Rubber armoured Aluminium Alloy & Polycarbonate chassis

Exit Pupil: 4mm

Field of View: 122m@1000m(7.0 angular degrees)

Dioptre Compensation Range: 7.5(with click stops)

Close Focus: 2.5m advertised, 2.26m measured

Eye Relief: 21mm

Prism: BAK4

Coatings: Differential Broadband Multi-coated, Proprietary F-Coat

ED Glass: No

Tripod Mountable: Yes

Waterproof: Yes

Nitrogen Purged: Yes

Weight: 614g advertised, 615g measured

Accessories: Lanyard, soft  leather carry case, microfibre cloth, ocular and objective covers, instruction manual and warranty card

Warranty: 30 years

RRP: £149

Several weeks ago, I began an in-depth investigation of porro prism binocular designs, having exhaustively examined many dozens of the more popular roof prism models, now saturating the market. My testing of two models from the internationally established optics manufacturer, Opticron, in particular, whetted my appetite for more studies on this highly traditional binocular design, so much so that I soon became enamoured by their charms.

In this blog, I will be reporting my findings on yet another Optricron-made porro prism binocular, the Imagic TGA WP 8 x 32, which has once again astonished this author in regard to the quality of both the optics and the design of the chassis, and which has caused him to radically re-think which models he wishes to use in the future.

Though I’ve been investigating the binocular market for just a few years now, I’ve had more of my fair share of fun with a number of Opticron-branded binoculars. Opticron began trading back in 1970 here in the UK, founded by a family passionate about bringing good value instruments to a rapidly expanding sports optics market. Today, Opticron enjoys a substantial part of the global market for binoculars, spotting scopes and a host of other optical technologies, and has gained the trust of many thousands of enthusiasts on every continent on God’s earth. Like the majority of companies in this industry, production of Opticron products has moved mostly to the Far East, either in China or Japan, where their well-orchestrated productions continue to manufacture high quality optical products to sate the demands of customers from every economic bracket. Today, their optical wares are well respected as offering exceptional value for money, and backed up by some of the best warranties in the industry.

Sourcing the Binocular

The Opticron Imagic TGA range of porro prism binoculars originally consisted of a 8 x 32, 8 x 42, 7 x and 10 x 50 models. The larger aperture models have earned a good reputation with stargazers, and are still going from strength to strength, but in the summer of 2020, the two more compact models  – the 32mm and 42mm – were discontinued. I was lucky enough to source a 8 x 32 model from The Birders Store, Worcester, which was being offered at the excellent sale price of just £109; a roughly 33 per cent knock-down on its recommended retail price. At that price ’twas a no brainer!

The binocular arrived very well packed. To be honest, I was quite taken aback by the very substantial build of the instrument and the rather fetching soft leather case it was supplied in. Tipping the scales at 615g, this is quite a hefty 8 x 32, about 65g heavier than an average 8 x 32 but not quite as hefty as the Leica Trinovid HD 8 x 32(650g) I once had the pleasure of owning. I elected to remove the blue and silver waterproof sticker from the front of the rubber armoured chassis pretty much immediately. Here it is in all its glory:

The Opticron Imagic TGA WP 8 x 32, with its ocular and objective lens covers attached.


The instrument is built like a proverbial tank. The bridge is made from high quality, machined aluminium, while the optics appeared to be accommodated in a polycarbonate housing, overlaid by a thick rubber armouring. Picking the instrument up and holding it in my hands, I immediately felt very comfortable with it.

Small porros are so nice to handle!

Like the lighter weight Savanna model I recently showcased, the binocular is exceptionally stable in my medium sized hands. These compact porro-prism designs are so very easy to grip, with plenty of contouring on the body to prevent accidental slippage while glassing.

The eyecups are thoroughly modernised, just like the Savanna 8 x 30 I  reviewed. They offer a very comfortable 21mm of eye relief and twist up before locking rigidly into position. Those who wear eye glasses will be delighted to hear that the entire field of view can be very comfortably observed. The cups themselves appear to be fashioned from metal and covered by soft rubber. I find them to be very comfortable to place my eyes against.

The Opticron Imagic TGA WP 8 x 32 has very well designed eyecups that offer a very generous 21 mm of eye relief, making observing with eye glasses exceptionally comfortable.

The focus wheel is very large and easy to access. Turning through just 0.75 revolutions from nearest focus to just beyond infinity, I would describe its kinematics as very fast. That said, the motions are very smooth, backlash free and it enjoys a nice amount of tension, moving easily with a finger’s worth of torque.

The dioptre compensation ring is remarkable, especially considering the modest price I secured the instrument for. It is very sensibly located under the right ocular, and has a very ingenious click-stop design. One adjusts it in the normal way, by rotating it either clockwise or anti-clockwise, but it locks rigidly into place once your desired setting has been achieved. If you look carefully under the dioptre ring, one can make out numerous  tiny teeth that enable the ring to slot into and hold its position well. This clever piece of engineering ensures that it will not move out of position, unlike some of the vintage designs I’ve had the pleasure of using while furthering my education in porro prism binocular use. Those other models have a dioptre ring that moves far too easily, making it almost essential to re-adjust the setting each time the instrument is taken out of its case.

The exceptionally clever and beautifully designed click stop dioptre compensation ring. Note the numerous tiny teeth under the rotating ring. Each slot between two consecutive teeth represents a ‘click stop.’

The optics are fully multi-coated and have been bestowed with a proprietary ‘F coat,’ which apparently enhances colour contrast. The colour casts under daylight conditions show that they are significantly different to the greenish casts observed on the Savanna 8 x 30 objectives. Looking straight through the objectives, the lens almost ‘disappears,’ indicating that the coatings were doing their job well. The objectives are recessed reasonably well too; not as deep as others I’ve used, but certainly not the worst I’ve seen by a long shot.

The distinctive anti-reflection coatings applied to the Opticron Imagic TGA WP 8 x 32.

The ocular lenses are also thoroughly modernised, presenting with large, 21mm diameter field lenses, so rendering eye placement child’s play. Intriguingly, the colour cast of the anti-reflection coatings on the ocular lenses is distinctly different to that presented on the objectives. I wonder if this is an example of a so-called differential multi-coating?

Check out the large (21mm) ocular field lenses.

All in all, the Opticron Imagic TGA WP 8 x 32 is a very robust and well designed binocular that is a pure joy to hold and view through. I can see why the company was offering this instrument with a 30-year warranty. It’s clearly built to last!

Optical Assessment

The instrument arrived perfectly collimated; and I mean perfectly! Indeed, I’ve not encountered a better collimated instrument than this compact porro from Opticron. Directing an intensely bright beam of light though the instrument showed no annoying internal reflections, diffraction spikes or diffused light around the light source. In addition, the binocular showed no glare or internal reflections when aimed at the April full Moon This was a very satisfactory result, as you can enjoy this binocular looking at illuminated objects at night, such as a city scape or harbour if star gazing is not your forte.

Examining the entrance pupil of both oculars showed nice round results. Nor was there much in the way of stray light near the exit pupils as you can see below:

Left eye.

Right eye.

Optically, the view through the Opticron Imagic TGA WP 8 x 32 is very impressive! The image is very sharp, contrast rich, and glare free. The sweet spot is very large – approximately 80 per cent – with only mild field curvature and some pincushion distortion creeping in as the field stops are approached. Indeed, it is this pincushion distortion at the field edges that helps keep the rolling ball effect at bay. Glassing the edges of wooded areas along a quarter mile stretch, produced none of the nauseating effects I encountered with models employing field flatteners. Chromatic aberration was pretty much absent from the centre of the image. but some lateral colour could be seen at the edge of tree branches observed against a bright, overcast sky. I took an image through the Opticron Imagic TGA 8 x 32 with my IPhone 7 to give readers an idea of how nicely corrected the field of view is:

The nicely corrected field of the Opticron Imagic TGA WP 8 x 32. 10-burst images with a 3-second delay through an IPhone 7. The image is totally unprocessed.

The central sharpness of these modern porros is quite remarkable. Glassing side by side with a highly-rated GPO Passion ED 10 x 32 ED roof prism binocular showed similar levels of sharpness for each instrument. The colour tone in the Opticron Imagic TGA 8 x 32 is more neutral than the GPO ED glass though, which showed somewhat warmer colours. If I’m being honest, I felt the Opticron delivered a colour rendition more true to life than the GPO.

Control of glare is very good indeed. Turning the binocular to a bush immediately below the Sun in a late afternoon sky, showed only minimal flaring, which could be largely eliminated by shading the objectives with an outstretched hand. Control of veiling glare was also impressive in this little Opticron porro; very comparable to the GPO Passion ED 10 x 32  I tested it against.

If you’re used to the enormous(8 degree +) fields of view of other small, classic porros, you may find the 7 degree true field of the Opticron Imagic TGA  to be a little restrictive. Indeed, in comparing the view in this binocular to the Japanese-made Opticron Dioptron 8 x 32 with its 8.25 degree field, gave the distinct impression that depth perception in the latter was a little bit more pronounced than in the modern Imagic. Indeed, I’m of the opinion that the 3D-like images served up by porro prism binoculars scales inversely with magnification and directly with field of view. For this reason, perhaps the most pronounced 3D images will be rendered with a 6 x 30 porro prism binocular. Where the modern Opticron excels though is image brightness. Comparing the images in a late model Carl Zeiss Jenoptem(1988) 8 x 30W and the Dioptron 8 x 32(late 1990s) showed that the Imagic was producing a brighter image than either, and with better contrast to boot. Clearly, the superior effects of these modern anti-reflection coatings were in evidence.


Concluding Comments & Recommendations

A binocular worth a 30-year warranty.

The Opticron Imagic TGA WP 8 x 32 is an excellent binocular, offered at an excellent retail price. I suspect that it had simply fallen below the radar of many binocular enthusiasts on account of its simple porro design and the steep competition it no doubt faced in light of all the roof prism models that were hitting the market at the same time. But having thoroughly tested this instrument, I cannot help but recommend it to anyone interested in acquiring an optically sound and mechanically excellent product, at a price that won’t break the bank. It’s a great shame it has been discontinued, but I have it on good authority that Opticron will still honour the 30-year warranty offered with the instrument, so the owner can be assured that they will take care of it should you hit any snags. I’m also very impressed with the accessories that came with the instrument, particularly the rather fetching soft leather carry case to store it in.

Even the carry case exudes quality.

More generally, I’ve enjoyed using these wonderful, cost-effective porro prism binoculars so much that I’ve become a firm fan. I feel their excellent 3D images add a new dimension to the observing experience, and their excellent value for money appeals to my desire to acquire the very best bang for buck I can get with my disposable income. The reader will note that the very best compact porro prism designs can still be had for prices roughly a quarter of those garnered by the best roof prism models. What’s more, the considerable advantages porro prism designs enjoy greatly outweigh their perceived disadvantages, in my opinion. And that’s great news for all binocular enthusiasts!


Thanks for reading!