EXCERPT page containing first few paragraphs. 2022-01-22 22:00:58
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Based on extensive field shooting, it was seen that using f/13 versus f/9 added only marginal depth of field, did little to improve corner quality and degraded the entire image from diffraction, seemingly more than usual from f/9 to f/13.
The question thus arises: how does one deal with outdoor scenes in which the depth of field of f/22 would be desirable, but f/22 is unavailable and both f/22 and f/16 would degrade the image unacceptably (by diffraction)? The answer is focus stacking.
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