Quote:
Originally Posted by stardust steve
Also the focus ring on the 50mm when in Manual focus is very loose and moves by itself after obtaining focus.
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This can be fixed pretty easily be focusing in manual focus mode and then changing to AF focus mode, if you set the camera to back button focus.
http://www.learn.usa.canon.com/resou..._article.shtml
Back button focus separates the taking of the picture with the focusing of a picture - and is generally awesome.