Venkman Posted March 5, 2007 Share #1 Posted March 5, 2007 Advertisement (gone after registration) Hi, today I wanted to determine whether I need to clean my sensor soon or not - so I took a shot at my video screen and noticed a band in the upper left corner. My initial reaction from looking at that band was "Oh no, dead pixels" - but then I took a couple of shots and found that it does not show while shooting wide open? So, what's the expertise of fellow forum users on this one? (apart from "yes, the sensor should be cleaned") All 100% crops of the upper left corner. Please discuss - Dirk 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/17883-strange-streak-dead-pixels-or-else/?do=findComment&comment=190692'>More sharing options...
Advertisement Posted March 5, 2007 Posted March 5, 2007 Hi Venkman, Take a look here Strange Streak - dead pixels or else?. I'm sure you'll find what you were looking for!
barjohn Posted March 5, 2007 Share #2 Posted March 5, 2007 You have dust on your sensor and you can clean it with Eclipse and their swabs. If this is your entire sensor, two dust spots is not bad and may not be worth the effort. The streak, I believe, is a known firmware bug at high ISO that is supposed to be fixed in 1.10. Someone correct me if I am wrong. Link to post Share on other sites More sharing options...
bayerische Posted March 5, 2007 Share #3 Posted March 5, 2007 Typical row of dead pixels.... This seems too common! Link to post Share on other sites More sharing options...
Venkman Posted March 5, 2007 Author Share #4 Posted March 5, 2007 Hehehe - exactly what I feared, two answers, two opinions. As for dead pixels - why would they show only on apertures above 11? Dead is dead I would think? As for the bug - in the whole shot at 2500 I saw the "white" band just right off the center - but this is in the upper left corner? The more I think about it, the more confused I get. Link to post Share on other sites More sharing options...
jaapv Posted March 5, 2007 Share #5 Posted March 5, 2007 You could try uploading 1.091 and see if it disappears. Link to post Share on other sites More sharing options...
bayerische Posted March 5, 2007 Share #6 Posted March 5, 2007 Hehehe - exactly what I feared, two answers, two opinions. As for dead pixels - why would they show only on apertures above 11? Dead is dead I would think? As for the bug - in the whole shot at 2500 I saw the "white" band just right off the center - but this is in the upper left corner? The more I think about it, the more confused I get. Well I don't think they are 100% dead, let's say they are in a really bad shape:) Link to post Share on other sites More sharing options...
bayerische Posted March 5, 2007 Share #7 Posted March 5, 2007 Advertisement (gone after registration) BTW, do you mean that you don't see tham at F2.8 and ISO 2500? Link to post Share on other sites More sharing options...
jaapv Posted March 5, 2007 Share #8 Posted March 5, 2007 I do not think it is dead pixels - the row is not quite straight. Try cleaning your sensor first. It might just be a streak of dirt. Link to post Share on other sites More sharing options...
Venkman Posted March 5, 2007 Author Share #9 Posted March 5, 2007 BTW, do you mean that you don't see tham at F2.8 and ISO 2500? Nope - that's exactly my point. Jaap, I would be happy if that is dirt. But it's almost too regular for something natural 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/17883-strange-streak-dead-pixels-or-else/?do=findComment&comment=190736'>More sharing options...
jaapv Posted March 5, 2007 Share #10 Posted March 5, 2007 And that argues for dirt.Or maybe even a scratch. Link to post Share on other sites More sharing options...
Venkman Posted March 5, 2007 Author Share #11 Posted March 5, 2007 Hmm, don't like the scratch idea - that would mean that I got that while it was in Solms, since I never touched the sensor itself (only rocket blowering the thing). Link to post Share on other sites More sharing options...
usm Posted March 5, 2007 Share #12 Posted March 5, 2007 Make your test just with shutter speeds under 1/30 or lower with the different iso settings. I think you will see the dead pixel row (if it is the whole row) between iso 640 and 2500. This means, for me, you should change the sensor or the whole M8. Good luck. (I ' waiting for my second M8) Mario See also "M8 and stripes but not the Banding problem!" Link to post Share on other sites More sharing options...
Venkman Posted March 5, 2007 Author Share #13 Posted March 5, 2007 Make your test just with shutter speeds under 1/30 or lower with the different iso settings.I think you will see the dead pixel row (if it is the whole row) between iso 640 and 2500. You're right. I did test with 1/15 at 2.8 and it shows as well. It's just that small line, maybe 1/5 of the total height, but it shows. Contacted Leica already, let's see what they say. Thanks all for your advice - Dirk Link to post Share on other sites More sharing options...
blovitch Posted March 21, 2007 Share #14 Posted March 21, 2007 Did you get a definitive resolution / answer ? CHeers. -Tim Link to post Share on other sites More sharing options...
Venkman Posted April 2, 2007 Author Share #15 Posted April 2, 2007 Yes, according to Leica it's dead pixels and the pattern of when it shows and when not is typical for that. Camera is scheduled for a repair trip to Solms. Link to post Share on other sites More sharing options...
POKO Posted April 2, 2007 Share #16 Posted April 2, 2007 Hi, I had the same problem. Leica replaced the camera with a new one. Good luck. Per Link to post Share on other sites More sharing options...
Guest Walt Posted April 2, 2007 Share #17 Posted April 2, 2007 I recently had a similar problem--but my "line" ran from top to bottom, and was always lighter than surrounding pixels (and thus pretty much only visible in darker areas of the image). Like yours, it became more pronounced with higher ISOs, but unlike yours, it was aperture independent and showed clearly wide open. I also understood at that time (from another forum member) that lines of pixels fail in rows, not columns. Walt Link to post Share on other sites More sharing options...
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