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Forum: Pentax K-1 & K-1 II
08-18-2016, 09:10 AM
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You are right, but the whole thing really depends on a number of parameters. If you enlarge the cut out piece back to the original size (what usually happens on digital media like monitors) then the DoF goes down (like if you had used a smaller F-Number or larger! sensor).
Generally the word "change" here is misleading because the opening post was not about changing, but about a direct comparison and for this it is very important to also understand that the image frame itself must be kept equivalent.
Sounds like an easy question but is not easy to follow. I bet 3 out of 4 users don't understand it.
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Forum: Pentax K-1 & K-1 II
08-17-2016, 11:09 AM
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No. DoF is a purely perceptual thing, so regardless of the way you crop:
If you keep the viewing size and distance the same, any cropping creates a deeper (worse?) DoF compared to a larger sensor/uncropped image *showing exactly the same frame*.
Fun fact: If you just crop and then enlarge to same viewing size (thus obviously changing the framed area), the perceived DoF actually is more shallow compared to your uncropped image on the same sensor size, as you magnify more and all magnification results in less DoF. --> cutting/cropping anything in post changes DoF.
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