ArtZ Posted December 22, 2008 Share #21 Posted December 22, 2008 Advertisement (gone after registration) Hi Artz , yes , its DNG for sure , perhaps as its a little out its why its not the typical strong line . James Es normal que con tanta rayita se ponga la cámara tonta... Link to post Share on other sites More sharing options...
Advertisement Posted December 22, 2008 Posted December 22, 2008 Hi ArtZ, Take a look here grrrrr green line. I'm sure you'll find what you were looking for!
jamesmd Posted December 22, 2008 Author Share #22 Posted December 22, 2008 pero no esta movida ! Link to post Share on other sites More sharing options...
ho_co Posted December 23, 2008 Share #23 Posted December 23, 2008 I really don't understand. If the second image you have posted has no cropping, just JPG conversion from DNG, you shouldn't get the green line.... Art--I agree. This is the first time I've seen such a weak green stripe, and the first time a grossly overexposed light source hasn't been visible in the image. There isn't even a brightening in the sky at the right. Maybe this time the light source leaked under the dark reference pixels from outside the frame rather than from inside. That will be a first so far as I'm aware. ... I always heard you (can) get a green line when a bright light source is placed just at the border of the frame (or sensor). The street lamp you're talking about is out of the frame.... That's the understanding we've all had as well. ... It's also true I never had these green lines with any of my M8s .... They are extremely rare. Ed's and Mark's explanations are good, except that I've never seen the green stripe without also being aware of the overexposed source. James-- 1) Be sure before you start cloning that you make a duplicate layer to do the cloning on, since you're a little hesitant about the process. Or make a copy of the original file to work on so that you don't lose what you started with. The only way to get good with the process is to do it. And a year from now you'll look at this image and feel you can improve the job by cloning it again with the extra experience under your belt. 2) Did you shoot any additional image of the sky and/or this building? I'm just curious whether this isn't atmospheric haze or some other phenomenon because I've never seen the green stripe so unobtrusively present. But it stops at center and seems to be the right size and location for it to have originated with a street light, as you said; and if you connect the two lights in the image with a straightedge, they point directly to the end of the stripe at the edge of the frame. So in my book it's a green stripe till proven otherwise. Link to post Share on other sites More sharing options...
jamesmd Posted December 23, 2008 Author Share #24 Posted December 23, 2008 Hi Ho co . Here you have almost the same pic but a little earlier , and another nice big green line , but this one is what we could call a real green line we would expect for the case. cheers James 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/72043-grrrrr-green-line/?do=findComment&comment=755885'>More sharing options...
ArtZ Posted December 23, 2008 Share #25 Posted December 23, 2008 Jo, ¡tío, que mala suerte! When I see your pictures, James, I believe some cameras are more sensitive to the green line contamination than others. I've tried a few times trying to reproduce this phenomenon with my M8 and I haven't managed yet. I will try again when they will be back from Solms. Jaap was saying the same thing... until he got the green line (I saw some pictures here few weeks ago) but, even though, the green line wasn't that obvious as yours. I really believe that this problem, even if probably common to all M8, depends on the camera. Link to post Share on other sites More sharing options...
jamesmd Posted December 23, 2008 Author Share #26 Posted December 23, 2008 these are with sumicron 2/ 50 ( IV) not coded , I imagine that doesn't affect this problem but in case . James Link to post Share on other sites More sharing options...
Shootist Posted December 23, 2008 Share #27 Posted December 23, 2008 Advertisement (gone after registration) Jo, ¡tío, que mala suerte! When I see your pictures, James, I believe some cameras are more sensitive to the green line contamination than others. I've tried a few times trying to reproduce this phenomenon with my M8 and I haven't managed yet. I will try again when they will be back from Solms. Jaap was saying the same thing... until he got the green line (I saw some pictures here few weeks ago) but, even though, the green line wasn't that obvious as yours. I really believe that this problem, even if probably common to all M8, depends on the camera. Art it really is NOT dependent on which M8 you are using. Jappv said his camera did not produce the green band but in the end it did as pointed out by Sean Read. Every M8 will produce the green band. I can and have reproduced it on 4 different M8's. Link to post Share on other sites More sharing options...
ArtZ Posted December 23, 2008 Share #28 Posted December 23, 2008 Art it really is NOT dependent on which M8 you are using. Jappv said his camera did not produce the green band but in the end it did as pointed out by Sean Read.Every M8 will produce the green band. I can and have reproduced it on 4 different M8's. Ed, I probably didn't explain myself correctly. Jaap was saying (like me) we never had green lines. He posted a couple of pictures (with a green lamp on a desk) trying to prove us that he couldn't reproduce the phenomenon... and in one of them you could see a green line!!! but it was less obvious than other green lines we have seen before. Even jaap didn't realized when he posted the picture... What I was trying to say it's that some cameras seem to be more sensitive to green lines than others. It will be interesting to reproduce the same green line with two different M8 cameras taking the same scene... Link to post Share on other sites More sharing options...
Shootist Posted December 23, 2008 Share #29 Posted December 23, 2008 Given the right circumstances, lighting & background, all M8's produce the same green band. There are not some that do it more and somethat do it less, more or less sensitive. They are all the same. Whether you or anyone else has not had it happen does not mean your, or their, M8 is any different then any other. This is a proven fact. You may want to think your M8 doesn't do this but it does and I could make it happen with one shot, with the right circumstances. Just like I've been able to do with the 4 I've had. Try a bright lamp bulb (100W), no shade except behind the bulb, with a dark background. Place that bulb so it splits the edge of the short side of the sensor, either side of the sensor. You will have a green band. Move it so it is just outside the sensor, green band. Move it so it is totally in the frame, No band. If you can take shots like I describe above and you do not get a green band I really want to see those shots. Because my 2 M8's will be making another trip to Leica service to have both sensors changed to ones that do not produce the green band. Link to post Share on other sites More sharing options...
Jamie Roberts Posted December 23, 2008 Share #30 Posted December 23, 2008 Ed, I probably didn't explain myself correctly. Jaap was saying (like me) we never had green lines. He posted a couple of pictures (with a green lamp on a desk) trying to prove us that he couldn't reproduce the phenomenon... and in one of them you could see a green line!!! but it was less obvious than other green lines we have seen before. Even jaap didn't realized when he posted the picture... What I was trying to say it's that some cameras seem to be more sensitive to green lines than others. It will be interesting to reproduce the same green line with two different M8 cameras taking the same scene... Actually, *I* was the one that pointed out that Jaap's posted shot had the green line (not Sean) LOL!! Look--the artifact is more or less obvious depending on the background and illumination. Obviously against a green-stripey background, you won't see it as much. The lighter and more uniform the background, the more obvious the stripe. Jaap had a combination of dark areas that masked the artifact, but not completely. Every single M8 is susceptible to the artifact. I heard this from Stefan Daniel himself. There is currently no camera-based fix. It is very rare, but it does definitely happen to all cameras, and depends also on the exposure level of the triggering light source (has to be over-exposed, in my experience). Now--the original shot posted doesn't seem to have the artifact at all--it looks like a cloud to me (just because you didn't see it doesn't mean the camera didn't)...and, if I'm seeing properly, the thin wavy line looks like a actual part of the image content. In the second shot posted, the green stripe artifact--straight and wide--is obvious. Link to post Share on other sites More sharing options...
UliWer Posted December 23, 2008 Share #31 Posted December 23, 2008 Now--the original shot posted doesn't seem to have the artifact at all--it looks like a cloud to me (just because you didn't see it doesn't mean the camera didn't)...and, if I'm seeing properly, the thin wavy line looks like a actual part of the image content. In the second shot posted, the green stripe artifact--straight and wide--is obvious. I agree with your opinion: the second photo clearly shows the green line as an artefact and you see exactly where it comes from: bright light at the edge of the sensor format. The first photo shown in this thread looks different to me, for the green(?) line does not seem straight but wavy. It could be the effect of an aircraft in the evening sky. Link to post Share on other sites More sharing options...
ho_co Posted December 23, 2008 Share #32 Posted December 23, 2008 I think the waviness we're seeing in the first shot is due to background clouds just happening to be at the same level as the green stripe. The left end of the stripe stops suddenly just at image center, and there's another streetlight invisible just off the edge of the frame. If I could see even a vestige of the stripe to the left of the building, I'd put it down to weird atmospherics. The vertical shot of the building is more typical and immediately recognizable. The first shot is definitely the least intrusive green stripe I've ever seen, but I think it's still the green stripe. Pity about the stripe. I really like the various colors of artificial light sources juxtaposed with the sunset reflection in the building windows. It's interesting that you got two green stripe shots shooting this building. That's your quota for the next four years, so you should be home free! Link to post Share on other sites More sharing options...
kepstein Posted December 28, 2008 Share #33 Posted December 28, 2008 Here's my recent experience at the Vatican: 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/72043-grrrrr-green-line/?do=findComment&comment=759777'>More sharing options...
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