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Forum: Pentax K-5 & K-5 II
02-11-2011, 08:54 PM
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No, you are not an idiot, and if you are focusing at very close distances to the spdyer Lenscal...then you should see 50/50 dof either side of the focal point...
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Forum: Pentax K-5 & K-5 II
02-11-2011, 04:49 PM
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at 50mm F2.8 , distance to image 50 cm, the DOF is 1.02 cm, the near limit is 49.5 cm and the far limit is 50.5 cm......... that's a equal amount of DOF in-front and behind the subject......
if however the subject is 1000 cm away...the dof will extend further to the rear of the subject than the front...in this case ...DOF is 474 cm, near limit is 816 cm, far limit is 1291 cm........so that's 184 cm in front of the subject and 291 cm behind the subject .
so if shooting focus charts at very close distances you should be aiming for equal DOF, in front and behind the subject.......as the 1/3-2/3 rule is only at much greater distances from the focal plane
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Forum: Pentax K-5 & K-5 II
02-11-2011, 04:27 PM
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at least your be able to tell the rest of us if a new FW does hit the download area :lol:
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