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how to test for optical quality

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/02/2014 at 11:38
machi View Drop Down
Optics GrassHopper
Optics GrassHopper
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Joined: December/01/2013
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Points: 10
Hello!

I just wanted to know how could i test rifle scopes for their optical quality. I have good eyes, but i would love to take this to a cuantitative level. For examply is there a way how mucho chromatic aberration a scope has? can i put a number on the CA? what about the resolution? should I search for other things too?

I was thinking about using an ISO 12233 chart:


And then take photos with the different scopes and see.

The problem might be different zooms on the scopes. And even at same "x" zoom seems not all scopes have the same "image size", so how can i cope with that?

Thanks!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/02/2014 at 12:11
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Optics GrassHopper
Optics GrassHopper


Joined: January/26/2014
Location: Ontario Canada
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Points: 34
You could do it your own way and report back with your results, then you can learn from it a tweak your approach for next time. Remember that there is the low light aspect to this test as well.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/02/2014 at 13:01
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Optics GrassHopper
Optics GrassHopper
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Joined: March/01/2014
Location: Tropical MT
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While resolution and chromatic aberration are very important factors for camera lenses, binoculars, and spotting scopes, they're probably not so important for a rifle scope (as a targeting tool) over the ability to hold a zero, and accurate ballistic and windage adjustments.  While fine resolution and low CA rifle scopes are a joy to look through and less fatiguing, I'm thinking that brightness, eye box, parallax, and lens flare are more important optical properties.
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