spikemozeley Posted November 15, 2017 Share #1 Posted November 15, 2017 Advertisement (gone after registration) Hi everyone, Today I tested a 50 Summicron to use on my Monochrom. After mounting it my coupling mechanism seemed to get stuck. Also the lens makes a sound like there is some grit stuck in it. Unually when the lens is not mounted it makes no noise. When trying other lenses back on my body the coupling seems fine and there is no noise. Thoughts? Quote Link to post Share on other sites More sharing options...
Advertisement Posted November 15, 2017 Posted November 15, 2017 Hi spikemozeley, Take a look here Coupling Issue. I'm sure you'll find what you were looking for!
jdlaing Posted November 15, 2017 Share #2 Posted November 15, 2017 Which 50 Summicron? Quote Link to post Share on other sites More sharing options...
spikemozeley Posted November 15, 2017 Author Share #3 Posted November 15, 2017 Is from 1993 according to serial. Not sure what version number. Very strange to me that it sounds gritty when mounted but not when unmounted. I check all my other glass and none make the same noise on my body. I was worried that it was my body so thankfully that's not the case! Quote Link to post Share on other sites More sharing options...
pop Posted November 15, 2017 Share #4 Posted November 15, 2017 The manual for the Leica M (Typ 240) contains the following statement: • Cannot be used: – Hologon 15mm f/8 – Summicron 50mm f/2 with close up. – Elmar 90mm f/4 with retractable tube (manufactured from 1954-1968) – Some versions of the Summilux-M 35mm f/4 (not aspherical, manufactured from 1961-1995, Made in Canada) cannot be fi tted to the Leica M or will not focus to infi nity. The Leica Customer Care department can modify these lenses so that they can be used on the Leica M. It appears that these and/or similar restrictions existed for the earlier digital M cameras as well, even though they were not mentioned in the respective manuals. Quote Link to post Share on other sites More sharing options...
Rus Posted November 15, 2017 Share #5 Posted November 15, 2017 (edited) Just my wild stab in the dark.... Have you tried turning the focus ring on the lens while using a finger to press against its rear focus cam? It may be something wrong with the focus cam / focusing unit of the lens. When mounted, the camera's RF roller cam presses against the lens's rear cam, and the pressure perhaps prevents it from turning at the same angular speed as the focus ring, which may also be why there is that scraping feeling. Edited November 15, 2017 by Rus Quote Link to post Share on other sites More sharing options...
spikemozeley Posted November 15, 2017 Author Share #6 Posted November 15, 2017 Thanks for the replies. Unfortunately I have just discovered that it is in fact my body. The focus mechanism is sticking. Disappointing as it's a new camera only a few months of use... 1 Quote Link to post Share on other sites More sharing options...
Rus Posted November 15, 2017 Share #7 Posted November 15, 2017 (edited) Advertisement (gone after registration) Thanks for the update. Sorry to hear about the problem with the camera. My friend's M240 used to loose the coupling when focused to close distances. It turned out that the RF roller cam was somewhat stuck once it extended out to a certain degree. He gave the roller cam a few pushes back and forth, which seemed to loosen it. Not a long-term solution though, but it did the trick for him for a while. In the end the camera went back to normal after some intensive use. From your descriptions the problem with your MM seems somewhat more serious, but I guess a trip to a qualified service person should fix it, as it does sound like a mechanical problem rather than a fault with the electronics. Edited November 15, 2017 by Rus Quote Link to post Share on other sites More sharing options...
exile Posted November 17, 2017 Share #8 Posted November 17, 2017 Very sorry to hear about the camera Spikemoseley, but also wanted to congratulate you on the best thread title I've seen in 10 yrs of membership on this forum. Good luck with the fix. Quote Link to post Share on other sites More sharing options...
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