Binocular Masterclass | All About Optics | How to Choose Binoculars

Welcome to the ultimate Binocular Masterclass! In this comprehensive video, we delve into the fascinating world of binoculars and reveal the secrets to achieving optimal vision. Whether you're an outdoor enthusiast, birdwatcher, or simply curious about binoculars, this masterclass is your gateway to enhancing your visual experiences.

🔍 Uncover the Science Behind Binoculars: Discover the science that makes binoculars an essential tool for exploring the world around us. We'll explore the intricate workings of binocular optics, magnification, objective lenses, and more. Gain a deeper understanding of how these factors contribute to crystal-clear images and immersive viewing experiences.

📏 Choosing the Perfect Binoculars: Selecting the right binoculars can be overwhelming, given the vast array of options available. Fear not! We will guide you through the process, helping you understand crucial features like field of view, exit pupil, lens coatings, and binocular specifications. Unleash the power of informed decision-making and find the perfect pair that matches your specific needs and budget.

🌟 Unlock the Potential of Binoculars: From stargazing and wildlife observation to sports events and concerts, binoculars open up a world of possibilities.

🔔 Don't miss out on this definitive Binocular Masterclass! Subscribe now and hit the notification bell to stay tuned for upcoming lessons, tutorials, and exclusive content. Unleash your visual potential and experience the world in breathtaking detail.

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0:00 Intro
2:10 What is a binocular?
2:58 Types and Designs
4:23 The Big Three
6:51 Parts of a Binocular
7:30 Field of View
8:50 FOV Formulas
9:52 Eye Relief
11:22 Purging: Argon or Nitrogen
12:31 Waterproofing & IPX System
15:16 Light Transmission
16:23 Resolution
17:02 Arc Minutes and Arc Seconds
19:41 Contrast
20:56 Close Focus
21:33 Depth of Field
22:20 Prisms: Roof and Porro
23:18 BK-7 and BaK-4
25:03 Brightness
27:01 Aberrations: Chromatic Aberration
28:11 Distortion
29:20 Field Curvature
30:14 Collimation
32:45 Adjustment and Operation
36:47 Dispersion and Glass Types
39:45 Optical Coatings
42:50 Crown, Flint, and Fluorite Glass
44:42 ED Glass
48:42 Optical Design and Magnification
50:52 Exit Pupil
55:18 Binocular Selection and Recommendation
1:00:23 Diminishing Rate of Returns
1:02:24 Other Considerations

For further reading on optics and selection you can source the book Sport Optics by Alan R. Hale

Acknowledgements and credit for source images to the following: Swarovski Optik, Vortex Optics, Maven, Bushnell, Riton, Kowa, Elcan, Fujinon

Full Acknowledgements and credit to all those not listed here.

[stevendeary]

What a fantastic and comprehensive guide

[Mixedpuppy]

This video was the best video I could find to learn the most about binoculars. I couldn’t find anything better than this. I wanted to find something that went beyond the basics and not be protective to any particular brand. This was a well presented and detailed video for dudes off the street like me. Also it was pretty funny at times. The biggest thing it helped me with was understanding how to assess and evaluate binoculars and their glass. I couldn’t really understand the difference between a $50 pair vs $1000 pair but now I can. Thank you so much for this video. Do I get any college credit for this?

[MTimWeaver]

Nice video and confirmed most things I already knew and a few things I didn't.

My favorite set of binos/monocular is 70/80s-era K-Mart "Focal" brand of binoculars. At 7x35, they've got a great FOV and the light transmission (to my eye, at least) is good, even at night. Bought them new, and still have them. I did install the killflash ARDs on the objective lens for a time and while it may have killed the flash, it also killed light transmission, so now they just sit in the case if needed.

I have about 3-4 more sets, all of which were my dad's when he used to go hunting, though they're such odd 'sizes', I'm not sure how useful they would have been (10x25, 12x25, and a 8x monocular that isn't too bad).

[fmbga]

Argon or Nitrogen? Argon is a somewhat bigger atom than nitrogen, and as such it should be retained better. But nitrogen forms molecules made from 2 nitrogen atoms, while argon, a noble gas, remains monatomic. Both are fine choices to get all the moisture out of your optical tubes. However: do not count on it remaining like that forever. Nature, given time, tends to correct any imbalance. Outside air temperature and pressure will vary, sealing rings may become a little stiff in the cold, or deteriorate in excessive heat. At least a little water vapor will eventually make it inside your binos, and may condense inside. If you want to be a little obsessive about it, keep your binoculars safe by storing them in a warm, dry place, and by giving them some time to adjust to observing temperature.