Optical Quality 101

The optical quality of a binocular or spotting scope can be divided into several categories. Understanding the categories can help you differentiate between different optics, and find the right fit for you.
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Yellow Warbler audio recorded by Matthew D. Medler. Courtesy of The Macaulay Library at the Cornell Lab of Ornithology.
Yellow Warbler and Yellow Throated Warbler illustrations by Jen Brumfield.
www.jenbrumfield.com/

[@cchamborant207]

Cristal clear, thank you.
I've been reading technical articles about photolenses for years, but yours is very simple and pedagogical. Outstanding.

[@abdullahryan8816]

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[@ryderahmir6820]

@Abdullah Ryan yup, been watching on flixzone for since december myself :)

[@bransonkody3416]

@Abdullah Ryan yup, have been watching on Flixzone for years myself :D

[@ariantoby7359]

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[@willparsons32]

Great video but I think it depends on what a person would use the binos for... For the aid of locating an object for instance, I don't think sharpness would be an important option. To see the difference in a feather color or texture on the other hand, then glass quality is of top priority.

[@uctopgulumvardi]

Wonderfull explanation! Thank you!

[@rohitsarmele9810]

What dose objective lens size do ?

[@JabbuGuy]

Instructions unclear ended up using a toaster as binoculars
yes its a joke

[@superIuminaI]

Your explanation of field curvature is incorrect - field curvature refers to the edges of the field not being in focus when the center is, and is a contributing factor to edge-of-field sharpness
What you have described as 'field curvature' is actually rectilinear distortion - where straight lines look bent.

[@Ben_the_Ignorant]

Yep!

[@mikee5507]

THE BIG QUESTION IS: WHY?

[@hha8356]

202 likes

[@a.z.c.681]

In fact, I have a question. Why is the woman talking to us as we are kids in kindergarten?

[@jamiebaker7795]

No it's not helpful ,,,you never once mention coatings and there effect's