Imatest sharpness values

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nonproshooterdad Contributing Member • Posts: 830
Imatest sharpness values

I am comparing two different 70-200/2.8 lenses. Both at 200/2.8. One of them has focus breathing issue, so when I shoot with another lens, I have to back off some distance to create the same frame as the first lens.

Is this what the review website doing to give resolution values of the lenses? Just create the same frame and ignoring what subject distance to create the image?

I have problem in my test. One of them is sharper comparing in the same frame but different subject distance, but if shooting at same subject distance, one of them at 200mm and the other at 160mm, then the result will be reverted. I don't know how to compare with the review website's result.

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Canon EOS 5D Mark IV Sony a7 III Sony a7R IV Canon EF 85mm F1.2L II USM Canon EF 135mm F2L USM +13 more
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