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Lenses / Re: Trouble mounting a new 24-70 II
« on: April 22, 2013, 08:36:43 AM »
Most likely a tolerance stack up issue. My 70-200 is a little loose with some play, and the 24-70 is much tighter. Try inspecting both sides of the mount (lens and camera side) to ensure that it is free of debris. If you bought it at a brick-and-mortar store, you could bring it back and try it with some other 24-70s to see if one of them "fits" your cameras better.