Speak to me about these red dots I see in some photos. Are these dead pixels? I've actually seen this on both bodies I own. Is it from using too low an iso and no in camera noise reduction? Seems common but I'd like to eliminate it in post.
Aug 14, 2015 06:34 | #1 Speak to me about these red dots I see in some photos. Are these dead pixels? I've actually seen this on both bodies I own. Is it from using too low an iso and no in camera noise reduction? Seems common but I'd like to eliminate it in post. _______________
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JohnfromPA Cream of the Crop 11,255 posts Likes: 1525 Joined May 2003 Location: Southeast Pennsylvania More info Post edited over 8 years ago by John from PA. | Aug 14, 2015 06:48 | #2 Are you only getting these on a long exposure? I see in another thread you were shooting some long stuff using the bulb function because you didn't have a remote release. Anyway, you likely should have had long exposure noise reduction enabled to minimize the issue, But beyond that it sounds like a dead or stuck pixel. See https://photography-on-the.net/forum/showthread.php?t=980057 for a discussion. It will often clear and procedures are mentioned in that thread. There are also some YouTube videos floating around.
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Aug 14, 2015 07:43 | #3 It's odd because I've just recently experimented with long exposure. There are a couple red dots that I can see, and this is with both of my bodies. I'm assuming that because of these spots a sensor replacement is the only thing to totally eliminate this. This has to be some sort of defect with canon sensors? My tow bodies have 10000 exposures between the two of them and very few long exposures. So I'm not sure how I burned my sensor up already. I would say that between the two, I have shot 30 thirty second exposures and maybe 3 or four one minute exposures. These sensors are not durable? _______________
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Aug 14, 2015 08:17 | #4  Permanent banThose red spots are 'hot pixels'. They are normal and nothing is wrong with your camera. You can map them out by doing a manual sensor cleaning. You will want to verify the procedure, but it is something like this: WARNING: I often dispense advice in fields I know little about!
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rrblint Listen! .... do you smell something?  More info | Aug 14, 2015 10:12 | #5 GeoKras1989 wrote in post #17668437  Those red spots are 'hot pixels'. They are normal and nothing is wrong with your camera. You can map them out by doing a manual sensor cleaning. You will want to verify the procedure, but it is something like this: Remove lens. Don't forget to attach the body cap here Dive through menus to find MANUAL SENSOR CLEANING (NOW?) or something like that. Activate it. The mirror will flip up allowing you access to the sensor. DON'T DO ANYTHING INSIDE THE CAMERA! Let it sit for about 30 seconds. Turn off camera. Remove body cap here Remount lens. Remove battery for a few minutes. I believe this process detects and 'maps out' the hot pixels. I did this on my 500D years ago and it worked like a charm. I never needed it on my 60D and it was over 20,000 shots when I sold it. I hope this helps. Mark
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| Permanent ban Mark, of course your additions are correct. Thank you. WARNING: I often dispense advice in fields I know little about!
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