lct Posted March 7, 2014 Share #881 Posted March 7, 2014 Advertisement (gone after registration) As clear as i recall, CVF is mainly visible at f/16 on shots taken against the light where light sources are outside the frame. Any significant improvement there? Link to post Share on other sites More sharing options...
Advertisement Posted March 7, 2014 Posted March 7, 2014 Hi lct, Take a look here APO Summicron 50/2 ASPH: Central veiling flare / fogging. I'm sure you'll find what you were looking for!
01af Posted March 7, 2014 Share #882 Posted March 7, 2014 Do you have experience with the early (somewhat troubled) incarnation of the lens? Yes ... but only for a few minutes and a handful of frames, and none of them against harsh back-light. So I don't know if that sample had or didn't have any issues in back-light situations. I simply didn't try back then. ... any comments regarding differences between the two versions of the lens except for flaring? As far as I can tell from my limited experience: no differences whatsoever. Sharpness, lack of lateral chromatic aberration, character of rendition, transparency ... I don't see any significant differences. In the current lens, I find all the properties that won me over two years ago when I tried the early sample. It even has exactly the same focal length (51.6 mm). But then, I am comparing two-year-old pictures taken in one place with current pictures taken elsewhere ... Bottom line: No complaints from me. Link to post Share on other sites More sharing options...
pajamies Posted March 7, 2014 Author Share #883 Posted March 7, 2014 As clear as i recall, CVF is mainly visible at f/16 on shots taken against the light where light sources are outside the frame. Any significant improvement there? I do not know. I am waiting for summer lighting conditions to do testing. There has been no central fogging at f8 under wintery overcast skies. Some instances of unexpected veiling with light from street lamps from the side, though. Link to post Share on other sites More sharing options...
lct Posted March 7, 2014 Share #884 Posted March 7, 2014 Sure it's winter in some countries now but the sun is shining elsewhere so it should not be that difficult to do simple tests against the light at f/16 i would guess. Truth seems difficult to find there i don't know why... Link to post Share on other sites More sharing options...
01af Posted March 7, 2014 Share #885 Posted March 7, 2014 Truth seems difficult to find there, I don't know why ... Reading the posts might help. Link to post Share on other sites More sharing options...
pajamies Posted March 7, 2014 Author Share #886 Posted March 7, 2014 Sure it's winter in some countries now but the sun is shining elsewhere so it should not be that difficult to do simple tests against the light at f/16 i would guess. Truth seems difficult to find there i don't know why... My plan is to shoot the exact same sceneries with the sun in the same position in the sky, and then compare to the pictures from last summer that had the central fogging. In appr. four months. Would that not be a sensible approach ? Link to post Share on other sites More sharing options...
lct Posted March 7, 2014 Share #887 Posted March 7, 2014 Advertisement (gone after registration) Reading the posts might help. If you mean yours i don't see enough light in your pics sorry. I would take the same shots at f/16 and choose a slower shutter speed if i were you. Link to post Share on other sites More sharing options...
01af Posted March 7, 2014 Share #888 Posted March 7, 2014 If you mean yours ... I do indeed. ... I don't see enough light in your pics sorry. The light was blinding. The pictures are appropriately exposed and processed. I would take the same shots at f/16 and choose a slower shutter speed if I were you. I would actually read the posts if I were you. Link to post Share on other sites More sharing options...
lct Posted March 7, 2014 Share #889 Posted March 7, 2014 Not sure which posts you're referring to but you won't get any significant flare if you expose on the highlights as you did. I would do it again at f/16 with a slower shutter speed as i suggested above in order to get some overexposition. Unless your aim is to avoid CVF instead of showing it of course in which case your approach is of no use for me sorry. Link to post Share on other sites More sharing options...
Jeff S Posted March 8, 2014 Share #890 Posted March 8, 2014 Today, I fired a few frames against a bright sun at focus distances of infinity, 1.2 m, and 0.7 m, and at apertures f/8 and f/16. Again: no central veiling flare spots whatsoever. Not sure which posts you're referring to but you won't get any significant flare if you expose on the highlights as you did. I would do it again at f/16 with a slower shutter speed Didn't he do that? Jeff Link to post Share on other sites More sharing options...
lct Posted March 8, 2014 Share #891 Posted March 8, 2014 Exposing to the left is not the best way to show flare i'm afraid. I can understand that photogs spending $7K+ for one lens are willing to defend it rather than showing its flaws but they don't help me to figure out whether CVF has been eradicated on latest samples or not. Link to post Share on other sites More sharing options...
LVSBB6 Posted March 12, 2014 Share #892 Posted March 12, 2014 Are all the lens produced so far have this issue? I have been shooting mine for a few months and cannot detect the issue on the pictures. Link to post Share on other sites More sharing options...
Bill W Posted March 12, 2014 Share #893 Posted March 12, 2014 Are all the lens produced so far have this issue? I have been shooting mine for a few months and cannot detect the issue on the pictures. It does not appear that the issue affects every copy as some have reported here. Mine seems to not have the issue and I have had it since last July. Link to post Share on other sites More sharing options...
jbl Posted March 12, 2014 Share #894 Posted March 12, 2014 I have one with a 420... Serial number. I've never seen the flaring. Link to post Share on other sites More sharing options...
Bill W Posted March 12, 2014 Share #895 Posted March 12, 2014 Mine is a 416xxxx serial number. Link to post Share on other sites More sharing options...
jbl Posted March 12, 2014 Share #896 Posted March 12, 2014 Seems Bill and I got lucky. Here’s an example from my copy on my MM. Pretty certain this would have triggered it. Or it did, I’ve never noticed it and I’m about to be very disappointed. The setting sun is directly ahead, camera left. -jbl 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/208297-apo-summicron-502-asph-central-veiling-flare-fogging/?do=findComment&comment=2548438'>More sharing options...
LVSBB6 Posted March 12, 2014 Share #897 Posted March 12, 2014 Good to hear from everyone, logic tells me don't fix it if nothing's wrong with it. It appears Leica has finally fixed the issue for the lens with the newest shipment: Corrected Leica APO Summicron 50mm f/2.0 ASPH lens starting to ship again | Leica News & Rumors Link to post Share on other sites More sharing options...
pajamies Posted March 13, 2014 Author Share #898 Posted March 13, 2014 My impression of Solms having solved the CVF for my Summicron 50/2 AA was strengthened again by this photo taken in conditions that would have caused the CVFbefore the repair. There is, however, no pre lens repair photo of the manor, so no direct comparison. ISO 250, F 16, 1/180 sec. LR tweaking 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/208297-apo-summicron-502-asph-central-veiling-flare-fogging/?do=findComment&comment=2548927'>More sharing options...
lct Posted March 13, 2014 Share #899 Posted March 13, 2014 Thank you Pajamies. Would you mind to try again with one or two stops overexposed? Link to post Share on other sites More sharing options...
pajamies Posted March 13, 2014 Author Share #900 Posted March 13, 2014 Thank you Pajamies. Would you mind to try again with one or two stops overexposed? Will try. Here is a link to larger size of the photo + some others, of he manor https://www.dropbox.com/sh/uut0w91wgs3ug3h/grt3FCz0Sf Link to post Share on other sites More sharing options...
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