pkwok Posted January 19, 2019 Share #1 Posted January 19, 2019 Advertisement (gone after registration) I recently acquired a 2nd hand Noctilux 50mm f0.95. When I take images with M10 range finder, there is back focus shift. The images with EVF are fine. I tested the lens with M10 on a tripod, I confirm the back focus shift. My M10 is fine with my Noctilux V1 and my Summilux 50mm. So I would not like to adjust my M10. Would members suggest me to send the Noctilux back to Leica for tuning or calibration? I heard that this Noctilux cannot be re-calibrated, but I cannot confirm this with online information. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/293423-focus-shift-in-noctilux-m-50mm-f095/?do=findComment&comment=3667430'>More sharing options...
Advertisement Posted January 19, 2019 Posted January 19, 2019 Hi pkwok, Take a look here Focus shift in Noctilux-M 50mm f0.95. I'm sure you'll find what you were looking for!
pkwok Posted January 19, 2019 Author Share #2 Posted January 19, 2019 Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/293423-focus-shift-in-noctilux-m-50mm-f095/?do=findComment&comment=3667431'>More sharing options...
harryzet Posted January 19, 2019 Share #3 Posted January 19, 2019 unusable Link to post Share on other sites More sharing options...
evikne Posted January 19, 2019 Share #4 Posted January 19, 2019 I think the focus is at about "number 6" on all pictures, so I wouldn't call it focus shift (then it should have moved with different apertures). It looks more like ordinary back focusing. 4 2 Link to post Share on other sites More sharing options...
pkwok Posted January 19, 2019 Author Share #5 Posted January 19, 2019 Agree, maybe I have used the wrong terminology. Any possible remedy from Leica ? Link to post Share on other sites More sharing options...
evikne Posted January 19, 2019 Share #6 Posted January 19, 2019 (edited) If you have done this test several times with new focusing and the same result, you should send it to Leica for recalibrating. It's done for free if the lens have some warranty left, otherwise you have to pay for it. I think I once paid about 300 USD for a similar service. I haven't heard that this lens cannot be recalibrated, it sounds very strange. Edited January 19, 2019 by evikne Link to post Share on other sites More sharing options...
01af Posted January 19, 2019 Share #7 Posted January 19, 2019 Advertisement (gone after registration) That's no focus shift but back-focusing. As you can see, the focus shift is virtually non-existent. But the back-focusing needs to be addressed. Link to post Share on other sites More sharing options...
SMAL Posted January 19, 2019 Share #8 Posted January 19, 2019 It’s a back focus and can definitely be calibrated on the lens itself. I visited Leica Wetzlar and they checked all my Leica stuff. The CS guy told, if something would be off on the Noctilux they definitely would need to keep it there, since the calibration process is quite complicated, but 100% doable. Link to post Share on other sites More sharing options...
pkwok Posted January 19, 2019 Author Share #9 Posted January 19, 2019 This is quite reassuring, though at a cost. Thanks. Link to post Share on other sites More sharing options...
darylgo Posted January 19, 2019 Share #10 Posted January 19, 2019 Independent repairman can also fix this, I once had a lens that Don Goldman brought back to life, the lens was perfect except calibration was slightly off. He asked me to return it to him, no body sent, and he knew exactly what to do on the calibration and returned it perfectly adjusted. 1 Link to post Share on other sites More sharing options...
SMAL Posted January 19, 2019 Share #11 Posted January 19, 2019 vor 2 Stunden schrieb darylgo: Independent repairman can also fix this, I once had a lens that Don Goldman brought back to life, the lens was perfect except calibration was slightly off. He asked me to return it to him, no body sent, and he knew exactly what to do on the calibration and returned it perfectly adjusted. I think the F0.95 Noctilux is a little exception. 1 Link to post Share on other sites More sharing options...
mdemeyer Posted January 20, 2019 Share #12 Posted January 20, 2019 But worth asking Don. He does excellent work. Link to post Share on other sites More sharing options...
jto555 Posted January 20, 2019 Share #13 Posted January 20, 2019 On 1/19/2019 at 9:43 AM, pkwok said: I recently acquired a 2nd hand Noctilux 50mm f0.95. When I take images with M10 range finder, there is back focus shift. The images with EVF are fine. I tested the lens with M10 on a tripod, I confirm the back focus shift. My M10 is fine with my Noctilux V1 and my Summilux 50mm. So I would not like to adjust my M10. Would members suggest me to send the Noctilux back to Leica for tuning or calibration? I heard that this Noctilux cannot be re-calibrated, but I cannot confirm this with online information. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! It could be your camera out of adjustment. Do you have another (or other) lenses you could check in the same setup? If it is the camera then you can adjust the rangefinder yourself. Saves a 2 month wait. Link to post Share on other sites More sharing options...
pkwok Posted January 21, 2019 Author Share #14 Posted January 21, 2019 I checked my 50mm Summilux M at the same setting, no problem. Link to post Share on other sites More sharing options...
lexontario Posted January 21, 2019 Share #15 Posted January 21, 2019 I have 50 cron, 21 sem, 28 emarit, on a MP240 , all focus perfectly. I bought a 7Artisans 50 1.1 and had same problem as you with back focusing. The 7Artisans can be adjusted, so i did and now is focusing properly. Seems your Noctilux requires calibration. Hopefully you are close to NJ Update us once you have it calibrated, Im interested as to what you think about how it compares to your 50 lux Link to post Share on other sites More sharing options...
pkwok Posted January 21, 2019 Author Share #16 Posted January 21, 2019 I am not staying in US, so I have to send my lens to Leica in Wetzlar for repair. Will post updated information once I get the lens back. Link to post Share on other sites More sharing options...
reddott Posted January 21, 2019 Share #17 Posted January 21, 2019 pkwok I went through this about 2 years ago with my 0.95. I live in NJ and Leica NJ is only about 1/2 hour drive from my office. I realized I had an issue because I was testing the Nocti with a Summilux on a M246 I had just received. I took both lenses, the M246 and my M240 to Leica and went through it with the tech there. The brand new M246's rangefinder was also out. They repaired that in a day. When I went to pick up everything, he told me he was keeping the Noctilux because it was back focusing. They added a shim to correct it. The repair took two months but when I got it back focus was spot on. It's a great lens and it's disturbing and frustrating that it isn't working correctly. Given the cost of this equipment, I was very disappointed that the mono and the Noctilux (bought new) needed to be fixed. I only have good things to say about Leica NJ. They do take their time but when I got my lens back it was perfect. I'm sure someone else could correct the problem but for me I wouldn't chance it. I wasn't charged anything as the lens was still within the warranty period. Good luck and let us know how it turns out. Rich 1 Link to post Share on other sites More sharing options...
darylgo Posted January 21, 2019 Share #18 Posted January 21, 2019 35 minutes ago, reddott said: I only have good things to say about Leica NJ. They do take their time but when I got my lens back it was perfect. I'm sure someone else could correct the problem but for me I wouldn't chance it. I wasn't charged anything as the lens was still within the warranty period. Good luck and let us know how it turns out. I've had both types of experiences with NJ, when they're good they are very very good........ One reason I am reluctant to move away from my now perfect M240 is the year long calibration of many lenses and an added M9 body. Once everything was calibrated I test each lens before purchase for compatibility with my system. Maybe I am too demanding, the calibration makes the difference between good and outstanding. Link to post Share on other sites More sharing options...
windy2004 Posted October 6, 2021 Share #19 Posted October 6, 2021 Have you had Noctilux's back focus issue fixed? I can DIY and very easy to re-calibrate the lens. Link to post Share on other sites More sharing options...
Gobert Posted October 6, 2021 Share #20 Posted October 6, 2021 3 hours ago, windy2004 said: Have you had Noctilux's back focus issue fixed? I can DIY and very easy to re-calibrate the lens. After two years ….. 1 Link to post Share on other sites More sharing options...
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