The sharpness of a lens is a major concern for most photographers. This might be because we are worried about a defect in the lens, a problem with our technique or a problem with the camera. Or we might want to select a better lens.
In all these cases it is very helpful if we had an accurate and reproducible procedure for checking the sharpness of a lens that can be used by all or most photographers.
So with that background, how can I/should I check the sharpness of my camera lens?
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