How does sigma dg 28-300 zoom lock work Tags: SLR Canon Zoom Cameras Last response: March 18, 2010 2:45 PM in Digital Camera Share lakeman February 1, 2010 6:11:55 PM 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? More about : sigma 300 zoom lock work Anonymous March 18, 2010 2:45:39 PM 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! Can't find your answer ? Ask ! Publish Related resources: Forumzoom lock on sigma lenses... 28-300 . ForumCanon L versus Sigma EX, any true in what George Preddy wr.. ForumSigma vs. Tamron for EOS? ForumTele zoom for Canon 350D Forum300D/Tamron 28-300 Upgrade Recommendations ForumIs this tyical difference between zoom and prime? ForumZoom lens for Canon 300D - Tamron/Canon ForumNikkor 70-300mm f/4.5-5.6D ED AF vs. Tamron 28-300 mm f/3.5.. ForumE-300 vignetting? ForumNew 20D needs lenses ForumAnyone experiences with the Sigma 12-24mm Zoom ForumSigma "DC" 18mm F3.5 - 200mm 6.3 on my Pentax *ist D ForumComments on Tamron and Sigma lenses ForumNew Sony DSC-R1 APS Sized 10 Meg Camera ForumCanon EOS20D + Sigma 18-50mm EX-DC f/2.8 ForumAny input on Sigma EF 500 DG Super flash? ForumD50, 350d, or P&S ForumSigma Four Thirds 20D-Killer rumor ForumWww kodak com/go/cameras ForumHow do you fix a file error on a Sony Cybershot Camera More resources Read discussions in other Digital Camera categories Camcorders Digital Photography DSLRs Point & Shoot SLR ZLR Kodak Nikon Sony !