Question about Sigma AF 28-200 Lens

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Auto focus not working properly.

Several years ago I gave my son a Minolta xtsi camera with a Sigma 28-200 AF lens. Last summer I put that lens on my Sony a100 and the lens has not worked properly since, on any minolta or sony camera. The AF servo motor? is almost constantly in motion with a loud sort of ratcheting sound. I was under the impression that minolta lenses would work OK on the Sony. Is there a solution?

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  • bobocris Mar 01, 2009

    I have a somewhat similar problem with my Sigma AF 70-300 DL Macro. AF just stopped working recently. I had it mounted on a Sony a100 for quite a while , working properly until now. Everytime I start or close the camera a whirring can be heard, but silence afterwards and AF not working at all. Can this be fixed?
    Thanks!


    Chris

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Hi It sounds as if the scale ring has gone ie needs a new one are you uk

Posted on Jan 01, 2010

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