bill_hocker1 Posted December 3, 2008 Share Posted December 3, 2008 Same issue here - more noticible on the right edge of the frame: http://www.usa.canon.com/uploadedimages/FCK/Image/REVERIE%20Still%20Photos/ Vincent_Laforet_5D_MKII_MG_0403.jpg Link to comment Share on other sites More sharing options...
ken schwarz Posted December 3, 2008 Share Posted December 3, 2008 Well, what do you know. The 30D has the same problem. I never noticed it before, but if you look for it, there it is. Maybe not as much, but definitely visible at 100% magnification at the borders between blown-out bright areas and surrounding shadows. Link to comment Share on other sites More sharing options...
hawkman Posted December 4, 2008 Share Posted December 4, 2008 Ken, Can you post a sample image from 30D that has this artifact? I have never noticed this with either the 20D or the 40D in similar situations, there are two 30+ sec exposures of Golden Gate bridge taken with 20D and 40D in my gallery with plenty of blown up lights but they don't show this artifact. This looks like a hardware issue in which saturated pixels can't hold charge, charge leakes out and the pixels are reset and read as zero. My concern is that this turns out to be like the MKIII AF fiasco in which cameras need to be returned and so on.... Link to comment Share on other sites More sharing options...
ken schwarz Posted December 4, 2008 Share Posted December 4, 2008 Here's my example. After comparing it with those from the 5D2, I'm thinking that they are not the same phenomenon. On these, you can see a black edge between blown out areas and adjacent dark areas, but they are not always to the right of the blown out areas as they are in the 5D2 examples. Also, the black edge is quite different from the block-like black spot, which looks bigger than a single pixel, but it sure is hard to tell.<div></div> Link to comment Share on other sites More sharing options...
hawkman Posted December 4, 2008 Share Posted December 4, 2008 Thanks Ken, to me, your sample only shows some noise, CA and oversharpened edges, I don't see any systematic artifact like the ones in 5DII images. Link to comment Share on other sites More sharing options...
ivan_gunduli_ Posted December 4, 2008 Author Share Posted December 4, 2008 Here same problem. Hmmmmm! <a href="http://www.usa.canon.com/uploadedimages/FCK/Image/REVERIE%20Still%20Photos/Vincent_Laforet_5D_MKII_MG_0403.jpg">http://www.usa.canon.com/uploadedimages/FCK/Image/REVERIE%20Still%20Photos/Vincent_Laforet_5D_MKII_MG_0403.jpg</a> Link to comment Share on other sites More sharing options...
shawn1965 Posted December 4, 2008 Share Posted December 4, 2008 Could this be part of the sharpening process, if these images were sharpened? Link to comment Share on other sites More sharing options...
thomas_hardy1 Posted December 4, 2008 Share Posted December 4, 2008 "Here same problem. Hmmmmm!" Hmmmmm, where? Link to comment Share on other sites More sharing options...
ivan_gunduli_ Posted December 4, 2008 Author Share Posted December 4, 2008 ^^ On the bridge lights above the couple to the right. Link to comment Share on other sites More sharing options...
brad_farwell Posted December 4, 2008 Share Posted December 4, 2008 I think I see what you mean on this one, though it seems more subtle than the other examples... Link to comment Share on other sites More sharing options...
davidlong Posted December 4, 2008 Share Posted December 4, 2008 Gleaned from trolling various forums: it seems to be pretty common (maybe even universal?); the problem appears in the RAW data, so it has nothing to do with converters, sharpening, etc.; one person said that, based on a side-by-side shoot, his 1Dsiii and 5D do not exhibit the problem, but his 5Dii does. Link to comment Share on other sites More sharing options...
mattb1 Posted December 4, 2008 Share Posted December 4, 2008 I'm with Thomas on that photo on the Canon site, it does not show the issue being reported. This is of concern though; I have a 5D mark II on order. So, I would be very interested in hearing from more users of the 5D mark II. That is first hand experience. However, this thread is the only place that I have seen any evidence of an issue. So, I'm reserving judgment at this point. If it is a problem with the camera, then I would expect Canon to fix it. Link to comment Share on other sites More sharing options...
paul_d7 Posted December 4, 2008 Share Posted December 4, 2008 <p>I have Photoshop CS4 Extended with the new ACR and I'm busting at the seams to work with a 5D2 RAW file. I'd like to see what artifacts and problems I could get to show up. I know I'm probably asking a lot, since that's basically an original file, I just have no 5D2 yet. It can be <strong>anything</strong>, a photo of the dumpster in your apartment complex, whatever, especially if a streetlight is nearby. I'd be happy to post all results and findings. I'd forward them onto Canon as well.<p><br/> Thanks,<br/> Paul<br/> Link to comment Share on other sites More sharing options...
._kaa Posted December 4, 2008 Share Posted December 4, 2008 dpreview forums have a useful discussion here: http://forums.dpreview.com/forums/read.asp?forum=1032&message=30222755 In particular, there is this screenshot of RAW data analysis at http://www.panopeeper.com/Demo/Canon5DMkII_BlackPixels.GIF Link to comment Share on other sites More sharing options...
mattb1 Posted December 4, 2008 Share Posted December 4, 2008 Another photo.net user has seen the issue: <p> <a href="http://submit.shutterstock.com/forum/viewtopic.php?p=766835#766835" rel="nofollow">http://submit.shutterstock.com/forum/viewtopic.php?p=766835#766835</a <p> Link to comment Share on other sites More sharing options...
hawkman Posted December 4, 2008 Share Posted December 4, 2008 .kaa, Interesting, is the RGB value of the "dead pixel" below or equal to the black level? Link to comment Share on other sites More sharing options...
felix_mizioznikov Posted December 4, 2008 Share Posted December 4, 2008 the raw is about 30mb and my email only allows like 10mb. do you have a ftp site? Link to comment Share on other sites More sharing options...
burger Posted December 5, 2008 Share Posted December 5, 2008 Very interresting. I was curious to see if my 50D could have the same thing, with this JPEG file, it doesn't seem so.<div></div> Link to comment Share on other sites More sharing options...
christopher_drost Posted December 5, 2008 Share Posted December 5, 2008 I have been using the 5DMark2 for well over a week now and have yet to see the black dot issue that's been surfacing recently. Mind you I have been shooting JPG as I didn't have the extra workflow time required to convert to DNG and have to upgrade to CS4... call it laziness to install DPP maybe. This issue however is making me curious.... Have been doing some extensive tests at night - running the full gambit of ISO and seriously have not seen anything remotely close to what's been appearing. I will go out tonight and try shooting some bright/dark scenes RAW to test it out however. This is the flickr link to all the test shots with links to view in full resolution as posted. http://www.flickr.com/gp/79642675@N00/U5x5vZ They're nothing special - just test night shots in a tow truck pound as well as some test video. Link to comment Share on other sites More sharing options...
hawkman Posted December 5, 2008 Share Posted December 5, 2008 Topher, I hate to say it but your images do actually show this artifact.<div></div> Link to comment Share on other sites More sharing options...
christopher_drost Posted December 5, 2008 Share Posted December 5, 2008 well holy bat guano in july - i'd been looking 100% at the brighter spots, not the smaller ones between the trailers. take a look at the 400ISO posted shot i have - it's very prevalent. that's native JPG by the way, unprocessed straight from the DCIM folder. oh this is gonna be interesting.... Link to comment Share on other sites More sharing options...
mariussabo Posted December 5, 2008 Share Posted December 5, 2008 I repeat a request from Paul DeCesare: Can anyoane upload a Raw file with this issue? Link to comment Share on other sites More sharing options...
nigel_jepson1 Posted December 5, 2008 Share Posted December 5, 2008 Here's a link to a RAW file showing the issue. http://www.jepsonphotography.co.uk/misc/20081129_220756_0073.CR2 Link to comment Share on other sites More sharing options...
hawkman Posted December 6, 2008 Share Posted December 6, 2008 <p>Thanks Nigel for posting the RAW file, here is a crop from DPP conversion with all parameters set to zero, the RGB value for the black pixels is below the black level meaning that the camera's ADC sees them as "zero"! Unfortunately this looks like a hardware issue so I am not sure how they can fix it but it is possible to add a routine to the converter to detect these false zeros and replace them with nearest neighbor values (albite this might be bad for people who like to do astrophotography!) Thanks for sharing and congradulations on your new camera.</p><div></div> Link to comment Share on other sites More sharing options...
hawkman Posted December 6, 2008 Share Posted December 6, 2008 <p>and here's a screen shot with RGB reading<br> </p> Link to comment Share on other sites More sharing options...
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