farnz Posted March 7, 2024 Author Share #12801 Posted March 7, 2024 Advertisement (gone after registration) 3 hours ago, Alberti said: Pete, so this is inherent to the lens? I have a problem too with aberations - vintage flavours. Now I have a higher resolution lens, I see more COMA. In several vintage lenses. [Actually because, to avoid noise, I open the lens more 🥵] My question is: Is coma lens-inherent, & was it a accepted as a design trade-off by dear Mr Mandler? So cherish that and be joyfull? Or is it also a decentering problem in older lenses? In other words, below I have an example, is it decentering or coma; will it help to send the lens to leica such that they can reallign a lens (or is that money lost). Below a summicron 35 from 1973. And I know that at that time I avoided the F2 opening as the plague. Now I open it up. Close-up on the other hand the lens is perfect with F2. albert 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! Albert, Firstly I don't see decentering in your 35 Summicron's picture but probably movement of the fairy lights on the branches owing to the wind moving the lights ('spectral highlights') while the shutter was open. If it was decentering I would expect to see, say, the left hand side of the picture in focus but the right hand side out of focus. Coma is a function of lens design and, as kindly pointed out by LCT, is a 'feature' of all 35/1.4 Summilux pre-asph v2's. The diminutive size of the lens means that there was little possibility to correct for optical aberrations such as Coma. Optical correction = more lens elements = a larger, heavier lens. I see it as a trade-off with the 35/1.4 Summilux pre-asph v2 for its tiny size and happily accept it. I expected to see Coma when I took the shot wide-open and if I'd wanted to reduce it I could have stopped the lens down. I thought it was an interesting demonstration of Coma. Decentering is not a result of a lens's age and is usually the result of a lens being dropped or put back together poorly after cleaning. If a lens is decentered then it should be re-centered with a collimator. I don't see decentering or excessive Coma in your Summicron's picture although I do see the "Maison du Whisky" neon sign looking a little blurry but I expect that its due to over-exposure of the bright sign compared to the rest of the picture and perhaps also being away from the plane of focus depending on the aperture used. The presence of Coma is not related to resolution but is related to the correction for Spherical Aberration, which is often corrected with aspherical lens elements. Coma is also more visible at wider apertures because the light rays will travel through the edges of the lens elements, which is where aberrations are more prevalent. By stopping down, the smaller aperture causes the light rays to travel through the centre of the lens and avoid the edges and aberrative glass. Pete. In keeping with discussions in the thread, here is an unrelated picture: 28/3.5 Kobalux with CL (digital) 9 Link to post Share on other sites More sharing options...
Advertisement Posted March 7, 2024 Posted March 7, 2024 Hi farnz, Take a look here The view through older Glass. I'm sure you'll find what you were looking for!
Alberti Posted March 7, 2024 Share #12802 Posted March 7, 2024 Thanks a lot. It will sound silly, but I had a , well, very bad feeling after I detected a few (only 4) evening pictures where the light point went beserk on the sensor, where the coma was like that. As thanks ❤️ for the feedback, I now will show a good picture where the same vintage lens is not vintage at all. Of course not stopped down - at F/2.0 too. 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! 35mm Summicron v1, M10-R 9 1 Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! 35mm Summicron v1, M10-R ' data-webShareUrl='https://www.l-camera-forum.com/topic/268173-the-view-through-older-glass/?do=findComment&comment=5079002'>More sharing options...
Alberti Posted March 7, 2024 Share #12803 Posted March 7, 2024 Lumix S5/ 35mm Summicron v1 A street vendor of cigarettes 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! 11 1 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/268173-the-view-through-older-glass/?do=findComment&comment=5079571'>More sharing options...
wolan Posted March 7, 2024 Share #12804 Posted March 7, 2024 Apo-Elmarit-R 1:2.8/180mm 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! 10 1 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/268173-the-view-through-older-glass/?do=findComment&comment=5079765'>More sharing options...
CaseyS Posted March 7, 2024 Share #12805 Posted March 7, 2024 M240 / 50mm Summicron V3 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! 10 2 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/268173-the-view-through-older-glass/?do=findComment&comment=5079874'>More sharing options...
JMF Posted March 7, 2024 Share #12806 Posted March 7, 2024 (edited) 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! 35 Summilux pre asph v2 on M10M Edited March 7, 2024 by JMF 14 2 Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! 35 Summilux pre asph v2 on M10M ' data-webShareUrl='https://www.l-camera-forum.com/topic/268173-the-view-through-older-glass/?do=findComment&comment=5079894'>More sharing options...
UliWer Posted March 7, 2024 Share #12807 Posted March 7, 2024 Advertisement (gone after registration) vor 8 Stunden schrieb farnz: Firstly I don't see decentering in your 35 Summicron's picture but probably movement of the fairy lights on the branches owing to the wind moving the lights ( Yes! If you look at the round lamp on the left building and especially at the lights in the windows of this building you don't see patterns of coma - you would see a lot with the 35mm Summilux pre. asph. fully opened. (Though perhaps this discussion could be moved in a new thread of its own - since it is quite an interesting topic...) 1 Link to post Share on other sites More sharing options...
frame-it Posted March 8, 2024 Share #12808 Posted March 8, 2024 SL2S + Pentax Takumar 85mm F1.8 [radioactive] 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! 9 1 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/268173-the-view-through-older-glass/?do=findComment&comment=5080245'>More sharing options...
frame-it Posted March 8, 2024 Share #12809 Posted March 8, 2024 SL2S + Pentax Takumar 85mm F1.8 [radioactive] 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! 9 2 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/268173-the-view-through-older-glass/?do=findComment&comment=5080249'>More sharing options...
01maciel Posted March 8, 2024 Share #12810 Posted March 8, 2024 Beach construction M10 + Yashica (C/Y) ML 50mm 1:1.4 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! 9 1 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/268173-the-view-through-older-glass/?do=findComment&comment=5081723'>More sharing options...
Alan Friedman Posted March 8, 2024 Share #12811 Posted March 8, 2024 (edited) 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! shallow. Edited March 8, 2024 by Alan Friedman 6 1 Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! shallow. ' data-webShareUrl='https://www.l-camera-forum.com/topic/268173-the-view-through-older-glass/?do=findComment&comment=5082574'>More sharing options...
JMF Posted March 8, 2024 Share #12812 Posted March 8, 2024 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! Noct Nikkor 58/1.2 ais on SL 601 12 2 Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! Noct Nikkor 58/1.2 ais on SL 601 ' data-webShareUrl='https://www.l-camera-forum.com/topic/268173-the-view-through-older-glass/?do=findComment&comment=5082805'>More sharing options...
frame-it Posted March 8, 2024 Share #12813 Posted March 8, 2024 SL2S + 90mm Elcan Summicron [1958] 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! 12 1 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/268173-the-view-through-older-glass/?do=findComment&comment=5082891'>More sharing options...
frame-it Posted March 8, 2024 Share #12814 Posted March 8, 2024 (edited) SL2S + 90mm Elcan Summicron [1958] 2 Purple Suvs in 3 minutes!...must be a new "show off" phase a.k.a Gangnam Style 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! Edited March 9, 2024 by frame-it 10 1 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/268173-the-view-through-older-glass/?do=findComment&comment=5082894'>More sharing options...
farnz Posted March 9, 2024 Author Share #12815 Posted March 9, 2024 2 hours ago, Alan Friedman said: shallow. Would you very kindly provide details of the camera and lens please, Alan? Pete. Link to post Share on other sites More sharing options...
Alan Friedman Posted March 9, 2024 Share #12816 Posted March 9, 2024 2 hours ago, farnz said: Would you very kindly provide details of the camera and lens please, Alan? Pete. Apologies... it's a Noct-Nikkor 58mm f1.2, likely early to mid 1990s, mounted on Leica M11 monochrom using a Novoflex Nik-M adapter. 3 Link to post Share on other sites More sharing options...
pgk Posted March 9, 2024 Share #12817 Posted March 9, 2024 1948 90/4Elmar on M9 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! 15 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/268173-the-view-through-older-glass/?do=findComment&comment=5084061'>More sharing options...
01maciel Posted March 9, 2024 Share #12818 Posted March 9, 2024 Idyll with minor flaws and a green tint. I guess it's not the lens. M10 + Yashica (C/Y) ML 50mm 1:1.4 on converted rangefinder coupled M adapter 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! 9 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/268173-the-view-through-older-glass/?do=findComment&comment=5084093'>More sharing options...
frame-it Posted March 9, 2024 Share #12819 Posted March 9, 2024 SL2S + 90mm Elcan Summicron [1958] 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! 7 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/268173-the-view-through-older-glass/?do=findComment&comment=5084109'>More sharing options...
frame-it Posted March 9, 2024 Share #12820 Posted March 9, 2024 SL2S + 90mm Elcan Summicron [1958] 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! 8 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/268173-the-view-through-older-glass/?do=findComment&comment=5084110'>More sharing options...
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