Forum: Pentax DSLR Discussion
09-09-2008, 07:39 AM
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You can also check Yvon Bourque blog for a focus test chart. He designed one that I think is among the easiest to use. Just don't forget that if you change focus adjustment for your lens, since it is a Sigma lens, the camera might not recognize the specific Sigma lens and could then apply the correction to other Sigma lens (want to know how I know that?).
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