How does sigma dg 28-300 zoom lock work

lakeman

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Oct 11, 2009
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Hello. I just got a Sigma DG 28-300mm lenses for my Canon Rebel XT. I am told that the lenses has a zoom lock. Where is it? How is it used?
 
G

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Sigma zoom lock, small toggle on base of lens that stops the zoom lens opening under gravity, it locks the Zoom at smallest mm setting or all the way in!
 

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