Question about Sigma 28-300mm f/3.5-6.3 DG Macro for Canon AF

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Sigma 28-300 Sigma lens lock

Can you advise? My Sigma 28-300 Sigma lens with a Canon mount will not stay locked in the 28mm position. When the camera is hanging from it's neckstrap, the lens' own weight is enough to disengage the lock and extend the lens fully. Help?

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Hi
Is it the later model with a 68mm filter thread it will have a zoom lock at 28mm or the older with a 72mm
which will not have a lock let me know which one you
have
garyphm@hotmail.com

Posted on Feb 24, 2010

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Posted on Jan 02, 2017

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db24937.jpg

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