An AR coating is extremely beneficial for both eyeglasses and sunglasses. The difference is that it is applied to both the front and back side of eyeglass lenses, and usually only applied to the back of sunglass lenses.

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It's also beneficial to have an anti-reflective coating applied to the back of your sunglass lenses to prevent that irritating glare from the sun behind you. The only reason you would want an AR coating on the front of your sunglass lenses is if you have a very light lens tint, such as yellow or amber.

The values for Field of View (FOV), sometimes sloppily referred to as "lens view" or better, "angle of view", come up frequently enough at the forums that I thought a list might be helpful for quick reference.

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Field of viewhuman eye

Panorama made of 12 vertical shots stitched together Nikon D70 with 12-24mm f/4G ED-IF AF-S DX Nikkor @ 12mm, f/7.1, 1/60s With hand-held SB-800 on SC-29 cable, TTL|BL flash setting

Angular field of viewvs fov

This one's easy! There's no difference between anti-reflective and anti-glare coatings. They're simply different terms for the same beneficial coating.

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Whether you're a new or seasoned prescription-wearer, optical lingo can be confusing. We're going to tackle everything you need to know about AR, or anti-reflective, coatings for your eyeglasses and sunglasses. Stick around to discover what AR is, if you need it, and if it's different than an anti-glare coating.

Field of viewcalculator

Mark Brickley (mbrickley) on November 9, 2024 in A Visit to the Falkland Islands and the Antarctic Peninsula

For a 55mm lens on a APS-C/DX sensor format body, the field of view would thus be 24.0 degrees horizontally, 16.1 degrees vertically and 28.7 degrees diagonally.

How to use the table: Hopefully the table is quite self-explanatory, but let's say you are looking for the Field-of-view of a 50mm lens mounted on an FX body. In the column "Lens Focal Length", go down to the row marked "50mm" and then over to the green area marked "35mm & FX format (1)". The FOV for a 50mm lens would be 39.6 degrees horizontally and 27.0 degrees vertically. Diagonally, the FOV is 46.8 degrees.

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Although it's possible, it's a bad idea to add an AR coating after the glasses have been completed. When the coating isn't added during the make process, it negatively affects the quality of your optics. At SportRx we have a See Better Guarantee, so if you decide you want an AR coating after receiving your glasses, you can send them back and we'll remake them for you.

Angular field of viewconverter

Anti-reflective, AR, and anti-glare—they're all the same and they're referring to a coating applied to your glasses. This coating minimizes glare and reflection bouncing off the surface of the lens. When glare and reflection are minimized, more of the light that you need to see makes it to your eyes.

Heinz Augustin (richmondguy) on November 20, 2024 in A Visit to the Falkland Islands and the Antarctic Peninsula

While it's not absolutely necessary, it's almost always a good idea to add an AR coating to your glasses. It's especially important for eyeglasses, because it makes a big difference in the quality of the optical clarity you're seeking as a prescription-wearer. Whether you have a clear lens or a transitions lens, an AR coating is extremely beneficial.

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Angular field of viewcalculator

Please note, this is a table of rectilinear values, i.e. values for rectilinear lenses; fisheye field of view is a different beast.

1. What is an Anti-Reflective Coating? 2. Do I Need an Anti-Reflective Coating? 3. Can I Add an Anti-Reflective Coating After Purchase? 4. Anti-Reflective vs. Anti-Glare