walt Posted May 26, 2011 Share #1 Â Posted May 26, 2011 Advertisement (gone after registration) G'day all, Â I was unlucky enough to watch my MP- 35 cron asph combo fall from a park bench seat onto the concrete floor lense down. I was fortunate that the round aluminium lense hood took the whole shock. No damage to the lense or the MP body apparent. However I believe that some of the force must have transferred to the helicoil/worm drive because the focus is very stiff (feels as if it is seized) when focussing from 3 m to infinity. From approx. 3 metres down it feels free as it should, but it jams as the interference fit gradually gets harder and harder when focussing further than 3 metres, progressively worse as it slides towards infinity. Any ideas on whether I could carry out a repair or restore it myself? Or does it require technical knowledge? I would appreciate your comments on the dangers of pulling the lense apart or whether any of you know of a simple solution to the problem. I have a feeling that it maybe more involved than I anticipate.... :-( Â Cheers, Â Walt Link to post Share on other sites More sharing options...
Advertisement Posted May 26, 2011 Posted May 26, 2011 Hi walt, Take a look here 35 cron repair question. I'm sure you'll find what you were looking for!
pico Posted May 26, 2011 Share #2 Â Posted May 26, 2011 "Leicalenz" is Latin for "Don't try to fix the lens yourself". Link to post Share on other sites More sharing options...
Rolo Posted May 28, 2011 Share #3 Â Posted May 28, 2011 If you need to ask the question, the answer is send it to the factory. Â Ive just had a 35mm Cron V4 repaired and calibrated to my M9. Returned yesterday and cost 328 Eur. Â Prior, I tried to get a local repair man to fix it. Could give me an estimate until he'd stripped it. Said, if it needed parts, he'd wait on Leica forever. Â As you dropped it, I presume there's insurance cover for it. Send it back and return it to it's perfect state. If you open it, you might discover that you can't reassemble it. Link to post Share on other sites More sharing options...
walt Posted May 31, 2011 Author Share #4 Â Posted May 31, 2011 They're the answers I expected, however I just posted hoping that on the off chance there might have been an expert amongst the members who from experience could have known about a simple/obvious overlooked DIY solution not involving touching the optic train. Cheers, Link to post Share on other sites More sharing options...
pgk Posted May 31, 2011 Share #5  Posted May 31, 2011 This happened to me with a 50/1.4 pre-asph. The hood took the impact but focus was stiff. A trip to Solms and €400 later (paid for by my insurers) and it felt as good as new. I wouldn't dream of doing anything with a damaged lens myself. Link to post Share on other sites More sharing options...
tobey bilek Posted June 1, 2011 Share #6 Â Posted June 1, 2011 The focus helicals are damaged, straighten or replace. Â You have zero chance of getting it right. Â The camera may also be damaged, lens mount knocked from alignment and/or rangefinder. Link to post Share on other sites More sharing options...
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