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Re: canon ef 50mm 1.4 can't focus <1m
If the AF motor is still alive + spinning, this should be fixable without any replacement parts. Following URLs might be useful: http://www.flickr.com/groups/canon_50mm/discuss/72157603775874649/ And this one - detailed instructions how to dismantle this lens and fix the issue similar to yours. http://www.fotomozaic.ro/artikel.php?idstory=225&s=1
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I had the same problem with my ef 50mm 1.8. I used it on a cold day and broke off one of the internal gears. I used it for almost a year before I got the guts to take it apart and fix it. There are instructions online on how to take it apart, scary at first but not that hard overall. I used a small drop of crazy glue on the gear, put it all back together and just like new.
yes thats a fair bet,,, it could only be the lens that took the brunt of the smack it had and its now jamming when you try to focus up on close ups,,,
try a difrent 50mm lens on it and find out if im right
This lens should have a 1 year manufacturers warranty on it, and if my guess that the USM motor is burned out is true I would have it serviced by an authorized service technician. Before you do this though I would try cleaning the lens contacts to make sure it is communicating with the camera body. I of course am going on the assumption that you have tried other lenses on the camera body to make sure the problem is the lens and not the body. I hope this helps!