thomas_vanagt Posted March 31, 2005 Share Posted March 31, 2005 My 50mm 1.4 won't focus anymore. Well, actually, it does, but only from far to close, not the other way round. Since I have 2 copies of the lens, I would like to try to fix this myself. Any suggestions? Link to comment Share on other sites More sharing options...
edward_h Posted March 31, 2005 Share Posted March 31, 2005 Not a solution but: yesterday night I found out my 35/2 gets stuck in close focus. It won't, just like yours, focus out to infinity. I'm going to the camera repair place to see if they can fix it. I don't expect 10 day old lenses to break like this. :( Link to comment Share on other sites More sharing options...
robin_sibson1 Posted March 31, 2005 Share Posted March 31, 2005 This problem with the 50/1.4 arises regularly. I had one repaired by Fixation in London, and they told me that it is because of the failure of some under-specified internal plastic component(s) associated with the kludge that allows the 50/1.4 to offer FTM focusing without a proper ring-USM motor. If you are brave/foolish enough to try repairing it yourself, expect to have to obtain some parts. Link to comment Share on other sites More sharing options...
miles_feigenbaum___dallas_ Posted March 31, 2005 Share Posted March 31, 2005 the old FD stuff doesn't sound too bad now. 30 years troublefree.. Link to comment Share on other sites More sharing options...
micheleberti Posted March 31, 2005 Share Posted March 31, 2005 I just ordered one of those 50mm f/1.4 USM .... and now reading this post I am just crossing my fingers LOL Link to comment Share on other sites More sharing options...
Greg M Posted March 31, 2005 Share Posted March 31, 2005 You'll probably be OK. I just would not use the FTM feature of this lens. As has already been said, the USM on this lens is the cheaper micro USM. Canon uses some sort of special linkage to give the user FTM, but don't think it's very wise to utilize the feature too often with this lens. Either turn the AF on or off like you would with a non-USM lens. Link to comment Share on other sites More sharing options...
parasko_p Posted March 31, 2005 Share Posted March 31, 2005 a very ignorant question..what is FTM? Link to comment Share on other sites More sharing options...
john_myers4 Posted March 31, 2005 Share Posted March 31, 2005 FTM - Full Time Manual focus, allows you to focus manually while keeping the lens set to Auto Focus Link to comment Share on other sites More sharing options...
Ian Taylor Posted March 31, 2005 Share Posted March 31, 2005 My 50/1.4 does this all the time too. Major PITA. Link to comment Share on other sites More sharing options...
tjavery Posted March 31, 2005 Share Posted March 31, 2005 I just posted to another thread about using the Canon plastic lens hood for the 50mm f/1.4. I don't have it (I use a generic rubber hood that screws into the filther threads), but the real hood fits onto the main body of the lens. This will physically protect the inner lens "barrel"- the one that moves in and out when focussing- from bumps and unnecessary loading. I've had the same AF problems as mentioned previously, and I think it's because I once dropped the lens on it's front. I don't use FTM, and have focussed manually only after turning off the AF switch. It's a shame that there are so many people reporting problems with this lens. It's a great prime and I love to use mine. -TJ Link to comment Share on other sites More sharing options...
digitmstr Posted March 31, 2005 Share Posted March 31, 2005 I wish Canon would come up with a REAL version of this lens :) I never use the FTM on it...but, they should just take care of the problem. Link to comment Share on other sites More sharing options...
micheleberti Posted April 1, 2005 Share Posted April 1, 2005 ...so in order to avoid any problem is recommended to do not use the FTM feauture on this lens? is this right? Link to comment Share on other sites More sharing options...
tjavery Posted April 1, 2005 Share Posted April 1, 2005 > so in order to avoid any problem is recommended to do not use the FTM feauture on this lens? is this right? I think that's the general consensus. The link between the focussing motor and the outer focussing ring is the weak link. It may give out or be damaged from excessive FTM. I also believe that you should protect the inner lens barrel from shock loads, as hitting it will put stress on the interal focussing parts. -TJ Link to comment Share on other sites More sharing options...
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