wkoniowalski Posted March 8 Share #1 Posted March 8 Advertisement (gone after registration) I've observed that my Summilux-M 35mm f/1.4 ASPH (previous 2019 version) is not as sharp as expected in the central region of images. This issue becomes particularly apparent when shooting at apertures such as f/5.6. I've noticed this both on my M11 and M10M cameras. Interestingly, the rest of the image, including both near and distant objects, appear very sharp, indicating that the problem isn't related to focus shift or camera shake. Is this a problem anyone else has encountered? Quote Link to post Share on other sites More sharing options...
Advertisement Posted March 8 Posted March 8 Hi wkoniowalski, Take a look here Centre sharpness of the Leica Summilux-M 35mm f/1.4 ASPH. I'm sure you'll find what you were looking for!
lct Posted March 9 Share #2 Posted March 9 If you mean the Summilux 35/1.4 FLE v1 (0.7m MFD), my copy does not suffer from this issue. Here on M11 @ f/5.6, FF & crop. 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! 1 Quote 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/390584-centre-sharpness-of-the-leica-summilux-m-35mm-f14-asph/?do=findComment&comment=5083104'>More sharing options...
wkoniowalski Posted March 9 Author Share #3 Posted March 9 My lens is the V2 copy manufactured in 2019. So it’s the version made before the current 2022 one. Unfortunately mine is not as sharp as yours in the image centre. No matter how it’s focused… Quote Link to post Share on other sites More sharing options...
lct Posted March 9 Share #4 Posted March 9 (edited) I would ask Leica what to do. Even if the lens is not under warranty any more, it may happen that Leica fix it for free. There is no harm to ask... Edited March 9 by lct Quote Link to post Share on other sites More sharing options...
wkoniowalski Posted March 9 Author Share #5 Posted March 9 Thank you for this advice. How would I go about asking Leica to check it? Obviously I don’t mind paying for the service if it’s needed Quote Link to post Share on other sites More sharing options...
lct Posted March 9 Share #6 Posted March 9 4 hours ago, wkoniowalski said: Thank you for this advice. How would I go about asking Leica to check it? Obviously I don’t mind paying for the service if it’s needed Many good people here would advise you to contact Wetzlar directly. I never do that as i'm an ugly lawyer knowing a little bit what can happen afterwards. There is no contract between you and Wetzlar so my best advice is to ask the dealer, if any, to whom you purchased the lens. But you live in Russia if i understand well and i know nothing about Russian law sorry. Also i don't know if you bought the lens second hand and to whom so i cannot advise you any further, sorry again. 1 Quote Link to post Share on other sites More sharing options...
wkoniowalski Posted March 13 Author Share #7 Posted March 13 Advertisement (gone after registration) Thank you for your input everyone. As it turns out I believe my BW red filter may have been the culprit here. I managed to take a few landscape test shots today filter-free and the resulting images are free of this issue. Also I am extremely flattered but unfortunately I am a British Columbian, regrettably not Russian! Quote Link to post Share on other sites More sharing options...
lct Posted March 13 Share #8 Posted March 13 Sorry for this confusion but glad your issue has been sorted out 🙂 Quote Link to post Share on other sites More sharing options...
Sebastian S Posted March 13 Share #9 Posted March 13 google infrared focus shift, that could have been a factor with the red filter on 1 Quote Link to post Share on other sites More sharing options...
RexGig0 Posted March 14 Share #10 Posted March 14 (edited) On 3/12/2024 at 9:45 PM, wkoniowalski said: Thank you for your input everyone. As it turns out I believe my BW red filter may have been the culprit here. I managed to take a few landscape test shots today filter-free and the resulting images are free of this issue. Also I am extremely flattered but unfortunately I am a British Columbian, regrettably not Russian! Yes, a red filter can affect focus. Not all wavelengths of light are exactly the same. Red is not as much of a shift as infrared, but there is a shift. This is not unique to users of Leica lenses, but is a property of light. Shooting with a red filter is best done stopped-down, or, taking several shots at ever-so-slightly different positions of the focusing ring, a.k.a. “focus bracketing.” Live View might work, to get critical focus, if it is possible to see well enough through the red filter. (I have not tried this, that I can recall.) I am not any kind of expert, and have not done much shooting with red filters, but have used infrared filters, during forensic photography training. The same principles apply. (It is NOT possible to use Live View, through an IR filter, so, I had to focus bracket.) Edited March 14 by RexGig0 Quote Link to post Share on other sites More sharing options...
Pyrogallol Posted March 14 Share #11 Posted March 14 If the lens has the Infrared focus mark you can reset the focus to that. Probably does not apply to modern lenses as they do not expect people to be using infrared film these days. 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! 1 Quote 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/390584-centre-sharpness-of-the-leica-summilux-m-35mm-f14-asph/?do=findComment&comment=5101019'>More sharing options...
RexGig0 Posted March 15 Share #12 Posted March 15 (edited) 12 hours ago, Pyrogallol said: If the lens has the Infrared focus mark you can reset the focus to that. Probably does not apply to modern lenses as they do not expect people to be using infrared film these days. 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! True! I do not have a Summilux-M 35mm ASPH FLE I, so, had to look for images on-line, and, did not see the little mark that indicates the offset for IR. Edited March 15 by RexGig0 Quote Link to post Share on other sites More sharing options...
M11 for me Posted March 15 Share #13 Posted March 15 (edited) Am 13.3.2024 um 03:45 schrieb wkoniowalski: regrettably not Russian 🫣 Edited March 15 by M11 for me Quote Link to post Share on other sites More sharing options...
convexferret Posted March 15 Share #14 Posted March 15 I'll add that an orange filter can also cause these issues. I've done tripod tests and found that even my more modern lenses can be slightly affected, although generally only wide-open and subtly. Yellow filters cause no visible shift that I can see, test or in real life. I'd suggest that anyone using stronger filters check to avoid surprises. 1 Quote Link to post Share on other sites More sharing options...
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