« on: November 27, 2013, 04:40:44 PM »
If Canon Canada is giving you a hard time, why not repeat your tests using one of your other lenses as proof to Canon that your testing is not in error?
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I notice that the lens cap is attached not to the lens body but to the moving element group. This troubles me, as the lens cap protrudes, and thus it is likely to be hit, resulting in a direct impact to the focusing apparatus. It seems to me that with the lens cap removed, the tiny front element is exposed, but the focusing apparatus is better protected. Also, the lens cap does not protect debris from entering the focusing mechanism, only from contacting the front element. Hence, I think I'll forgo the use of the lens cap.