Sigma APO 50-500mm F4-6.3 EX DG/HSM Lens Logo

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Posted on Dec 25, 2008
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Autofocus motor run but no focus

My Sigma 50-500 and Pentax K200d worked beautifully, the other day I went to take some pics but the motor runs but there is no focussing

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  • Anonymous Dec 29, 2008

    Auto Focus motor runs, but will not focus. Sigma 50-500 for Minolta/ Sony.

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  • Posted on May 28, 2009
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Found this myself check manual focus ring (closest to camera) maybe ring has moved to "manual"position. This ring moves backwards and forwards between "manual" and "auto" and may need pushing home completely

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  • Posted on Feb 21, 2009
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Clean the lens at both the sides, the mounting end and the front end.
I had the same problem and got it cleaned to get it working back.
Its bcz the sufficient light entry will be cut when dust accumulates.

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