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10-30-2009, 08:03 AM   #16
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Join Date: Oct 2009
Location: PL
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Nope - that is not FF/BF issue.
I am sure about the focus point - I always use the center AF point for focusing. I repeated this for many more pictures with the same conclusion.
If I shot on apertures between 1.4 and 2.5 I get crisp and sharp pictures - the phenomenon start when I choose f/2.8 on the camera :]

chrisg had the same problem - I wonder where it is programmed to do that (lens or camera)

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50mm, apertures, camera, correction, dslr, k20d, lens, pentax, photography, sigma, test
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