DOF and Cropping take 2

Started Feb 11, 2014 | Discussions thread
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Re: DOF and Cropping take 2
In reply to Ian Stuart Forsyth, Feb 11, 2014

I think confusion usually results from the one part of the DOF calculation which is slippery and subjective: the definition of how much blur is unnoticeable. Someone looking at a landscape on a monitor might define it as a given fraction of picture width... someone printing the landscape might define it as a small distance on the print, so it shrinks as you print larger... and someone like me who crops telephoto shots a lot might use a really strict definition that asks whether a focus error is undetectable at any magnification. You have to get everyone agreeing on those criteria before the equations actually clear things up in a discussion.

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