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04-08-2010, 05:34 AM   #1
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Join Date: Oct 2009
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Sigma 70-200 HSM and front-back-focus

Hi dears

Did everyone has problems of front-back-focus with Sigma 70-200 HSM and a K200D?

If I use an UV filter on this lens, is possible that the filter affects negatively the AF-system?



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