arvin Posted July 30, 2017 Share #1 Posted July 30, 2017 Advertisement (gone after registration) Hi all, Has anyone experienced the "Unknown Lens" message poping up on SL every time the lens and adaptor is slightly rotated or moved? Can that be turned off? Sent from my iPhone using Tapatalk Quote Link to post Share on other sites More sharing options...
Advertisement Posted July 30, 2017 Posted July 30, 2017 Hi arvin, Take a look here M adaptor L on SL. I'm sure you'll find what you were looking for!
vanhulsenbeek Posted July 30, 2017 Share #2 Posted July 30, 2017 (edited) No. It seems your adapter is faulty: exchange it at your dealer. Edited July 30, 2017 by vanhulsenbeek Quote Link to post Share on other sites More sharing options...
frame-it Posted July 30, 2017 Share #3 Posted July 30, 2017 your adapter rotates ? Hi all,Has anyone experienced the "Unknown Lens" message poping up on SL every time the lens and adaptor is slightly rotated or moved?Can that be turned off?Sent from my iPhone using Tapatalk Quote Link to post Share on other sites More sharing options...
arvin Posted July 30, 2017 Author Share #4 Posted July 30, 2017 Perhaps I didn't explain it properly. My apology. The adaptor doesn't rotates or move, it's the join between the lens and the adaptor. I was using the Noctilux 50/1 when this happened. If I try to rotate the lens, the camera will prompt for the message. I didn't really move or rotated it, it's just sometimes when I try to focus, I accidentally rotates the lens instead of the focus ring and therefore caused the movement a little bit. I didn't experience this when I was using other lens. My 90/2.8 is not coded and didn't have this problem. However, I never really try anyway. Quote Link to post Share on other sites More sharing options...
meerec Posted July 30, 2017 Share #5 Posted July 30, 2017 I've seen it before in a slightly different situation, where my leica-m lens that is a 25 years old cron 90 that is not 6-bit coded yet would pop up messages like you mention. This is related to the fact there is a screw on the lens mount, where the optical reader on the adapter tries to read the coding. Wiggling the lens in the mount by just a little, as little like a tiny fraction of a mm, may cause wrong readout. This is most likely happening to your leica-m lens when you move it a little by holding or even focussing. Different adapters optical readers respond differently with different tolerance of precision as I saw in my case by trying that cron on a few different adapters. Quote Link to post Share on other sites More sharing options...
arvin Posted July 30, 2017 Author Share #6 Posted July 30, 2017 yeah，Wiggling is the word I meant to use. so I guess it's normal then. Thanks a lot Quote Link to post Share on other sites More sharing options...
thighslapper Posted July 30, 2017 Share #7 Posted July 30, 2017 Advertisement (gone after registration) The problem is the alignment of the black and white coding dots on the lens flange with relation to the sensors on the adapter (or the M body). There is some variation on the amount of 'slack' when the lens is mounted and around the point it 'clicks' into place...... with some you can over-rotate by a few degrees and it is enough to confuse the sensor on the adapter/camera. Due to the black/white coding over 6 positions this is more of an issue with some lenses the others. I have a number of lenses which work fine on some cameras and regularly fail to register on others ...... it's all just a product of the rather flakey system Leica adopted to identify M lenses on their digital bodies. I doubt if you will find any 'fault' as such, but a change of adapter may solve it as no two are exactly the same..... but the problem is the coding of the 50/1.0 ...... which must have been added at some later stage as it pre-dates coding at manufacture. 1 Quote Link to post Share on other sites More sharing options...
arvin Posted July 31, 2017 Author Share #8 Posted July 31, 2017 The problem is the alignment of the black and white coding dots on the lens flange with relation to the sensors on the adapter (or the M body). There is some variation on the amount of 'slack' when the lens is mounted and around the point it 'clicks' into place...... with some you can over-rotate by a few degrees and it is enough to confuse the sensor on the adapter/camera. Due to the black/white coding over 6 positions this is more of an issue with some lenses the others. I have a number of lenses which work fine on some cameras and regularly fail to register on others ...... it's all just a product of the rather flakey system Leica adopted to identify M lenses on their digital bodies. I doubt if you will find any 'fault' as such, but a change of adapter may solve it as no two are exactly the same..... but the problem is the coding of the 50/1.0 ...... which must have been added at some later stage as it pre-dates coding at manufacture. Thanks. Most of my old M lens has no 6 bit code coded. So yeah.....I was just curious why it does to one but not the other. my name is Arvin and I am not a photographer. Sent from my iPhone using Tapatalk Quote Link to post Share on other sites More sharing options...
norm_snyder Posted March 2, 2018 Share #9 Posted March 2, 2018 (edited) I'm reviving an old thread, it appears, but I may have encountered a similar problem with the M adapter-L on the new CL. My 35mm v4 f2 Summicron, coded, and working fine on M bodies auto-codes as 35mm pre-Asph Summilux f1.4. Has anyone else encountered a situation in which the lens codes improperly, only if used iwht the adapter? What was the fix? Any of you SL owner own a CL, now? Edited March 2, 2018 by norm_snyder Quote Link to post Share on other sites More sharing options...
thighslapper Posted March 2, 2018 Share #10 Posted March 2, 2018 I'm reviving an old thread, it appears, but I may have encountered a similar problem with the M adapter-L on the new CL. My 35mm v4 f2 Summicron, coded, and working fine on M bodies auto-codes as 35mm pre-Asph Summilux f1.4. Has anyone else encountered a situation in which the lens codes improperly, only if used iwht the adapter? What was the fix? Any of you SL owner own a CL, now? The 6 bit coding on for the 35/2 and 35/1.4 is sufficiently different that the 'over-rotation' issue cannot explain it. Perhaps one of the 6 sensors on adapter is a bit dodgy ....... but it is hard to tell where the issue lies until someone else with a coded 35/2 tries it with an adapter on the CL ...... or you try someone elses adapter...... At the moment there are too many variables to pinpoint where the problem lies .... Quote Link to post Share on other sites More sharing options...
myuen888 Posted March 2, 2018 Share #11 Posted March 2, 2018 (edited) I have my SL, 24/90, and the Leica M-L adapter for about a month. I can mount the 24/90 just fine with just a normal twist. But, the M-L adapter requires much more force. Is this what your experience is with the M-L adapter? Edited March 2, 2018 by myuen888 Quote Link to post Share on other sites More sharing options...
norm_snyder Posted March 2, 2018 Share #12 Posted March 2, 2018 I don't have any native L-mount lenses, but I did note that the amount of torque to mount the adapter was significant, or at least seemed so in comparison to mounting lenses on my Ms. Quote Link to post Share on other sites More sharing options...
helged Posted March 2, 2018 Share #13 Posted March 2, 2018 I have my SL, 24/90, and the Leica M-L adapter for about a month. I can mount the 24/90 just fine with just a normal twist. But, the M-L adapter requires much more force. Is this what your experience is with the M-L adapter? Same here - I think this is how it is supposed to be from Leica's side. Possibly different materials used for the SL-lenses (including being water sealed) versus the Leica M-L adapter? I cannot check since I have neither with me now. Quote Link to post Share on other sites More sharing options...
thua Posted March 3, 2018 Share #14 Posted March 3, 2018 same as meerec described already but with a uncoded Summilux 75mm. Send the lens recently to Leica for coding, since then did not appear again. When using my Voigtländer 16mm Heliar with the M-L adapter this "unknown lens" occured always, was not possible to really work with that lens. Bought then a Novoflex M-L adapter (w/o optical sensors) and no problem anymore. cheers thua Quote Link to post Share on other sites More sharing options...
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