Question about Canon Normal EF 50mm f/1.4 USM Autofocus Lens

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Canon ef 50mm 1.4 can't focus <1m

I recently dropped my eos3 with canon 50mm 1.4 attached.

Since then the close focussing stops at about 1 m. Any less than that is impossible via auto or manual focus.

Any ideas for a do it yourself fix? Or should this be cheap to fix if I take it to a camera repair expert?

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  • cosminandrei Feb 16, 2009

    i dropped mine and the autofocus doesen't work under 1m and works quite poorly above . however when it happens to work it works very fast and accurate.

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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

Hope this helps - good luck!
Raf

Posted on Feb 01, 2010

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  • 115 Answers

Sorry, your autofocus engine might be broken or damaged. ou will have to take your lens to a repairman

Posted on Feb 04, 2009

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1 Answer

The Auto focus just stop working


Hey Sammymalone,
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!

Sincerely,
Allan
Go Ahead. Use Us.

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