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04-08-2011, 09:27 PM   #1
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Help with Sigma 150-500mm lens and K10d

I recently purchased a Sigma 150-500 lens for my K10D camera. It has a difficult time to auto focus. When I depress the shutter release halfway it tries to focus but can't seem to get there. I have version 1.31 firmware. Any suggestions?

Last edited by NBC; 04-09-2011 at 07:43 AM.
04-08-2011, 11:00 PM   #2
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