woodda Posted January 22, 2007 Share #1 Â Posted January 22, 2007 Advertisement (gone after registration) I tried this test again with a dealer in London today. I took picture with M8 and 50 1.4 of a R9 in a display cabinet. The white LEICA engraving on the front comes out white with Orange fringes. I had the same problem with white window frames. Â P.S. the lense did not have a UV filter if that helps and I did not notice the problem was more with JPG rather than RAW Â Thanks in advance Regards Link to post Share on other sites More sharing options...
Advertisement Posted January 22, 2007 Posted January 22, 2007 Hi woodda, Take a look here Orange fringing of highlights. I'm sure you'll find what you were looking for!
jaapv Posted January 22, 2007 Share #2 Â Posted January 22, 2007 Maybe it would help if you post an example. In general the M8 is not more - rather less- susceptible to things like CA and sensor blooming that most high-level digitals. Link to post Share on other sites More sharing options...
woodda Posted January 24, 2007 Author Share #3 Â Posted January 24, 2007 Jaap, Thanks for the post. please see 400% enlargement of window in picture. As you see the white has a orange/purple tinge. Any suggestions haev you seen this before. Â 1.09 firmware. I will try IR filter next but not sure this will fix this as I understand this relates to other issues Link to post Share on other sites More sharing options...
wparsonsgisnet Posted January 24, 2007 Share #4 Â Posted January 24, 2007 This looks like something discussed in another thread, where there is cross-talk of the pixels because the image (in this case the white area just to the left of the orange line) is burned out. Â The too-bright image sends part of the electrical (electronic?) energy to the adjacent, dard pixels, causing them to show the orange color. Â The original poster can say this a lot better.... Link to post Share on other sites More sharing options...
woodda Posted January 24, 2007 Author Share #5 Â Posted January 24, 2007 Thanks is a fix or am I doomed. Link to post Share on other sites More sharing options...
wparsonsgisnet Posted January 24, 2007 Share #6 Â Posted January 24, 2007 I believe you merely need to reduce the original exposure, so that the white is not overexposed. Â Check posts # 6 and 7 here: http://www.leica-camera-user.com/digital-forum/14253-chromatic-aberration-moire.html?highlight=pixels Link to post Share on other sites More sharing options...
bradreiman Posted January 25, 2007 Share #7 Â Posted January 25, 2007 Advertisement (gone after registration) ok....400% enlargement? this is ridiculous. there is barely any fringing in this extremely overexposed minute fraction of an image. relax and shoot some pictures. im afraid the internet madness about the m8 has people overly paranoid and has resulted in unprecedented pixel peeping on an unimaginable scale....b Link to post Share on other sites More sharing options...
Shootist Posted January 25, 2007 Share #8 Â Posted January 25, 2007 Jaap,Thanks for the post. please see 400% enlargement of window in picture. As you see the white has a orange/purple tinge. Any suggestions haev you seen this before. Â 1.09 firmware. I will try IR filter next but not sure this will fix this as I understand this relates to other issues Yeah don't blow it up to 400%. Link to post Share on other sites More sharing options...
jaapv Posted January 25, 2007 Share #9  Posted January 25, 2007 Jaap,Thanks for the post. please see 400% enlargement of window in picture. As you see the white has a orange/purple tinge. Any suggestions haev you seen this before.  1.09 firmware. I will try IR filter next but not sure this will fix this as I understand this relates to other issues  400% ? Enlarge a scan of film to 400% and compare. You'll burn anything in your house marked "Kodak" in frustration. There may well be some IR involved. IR has another plane of focus than visible light. That will result in purple fringing (in fact, a kind of CA) at extreme enlargement. But high contrast will also produce sensor blooming ( also purple, especially on Canon's Cmos sensors), and electron spillover etc. You can tease receptors, be it sensors or film, into any number of aberrations and see them if you enlarge enough... How did the picture look in print? Because that is the touchstone of photography. Link to post Share on other sites More sharing options...
gravastar Posted January 25, 2007 Share #10 Â Posted January 25, 2007 400% ? Enlarge a scan of film to 400% and compare. .............. But high contrast will also produce sensor blooming ( also purple, especially on Canon's Cmos sensors), and electron spillover etc. ................................................ Â Here's what happens to a Canon 5D with similar subjects, at 400x. There's no doubt as to which image I'd prefer. For some architectural subjects it can be a problem with the 5D. As people have said what's important is the print at normal viewing distance. Â Bob. Link to post Share on other sites More sharing options...
gogopix Posted January 25, 2007 Share #11  Posted January 25, 2007 ok....400% enlargement? this is ridiculous. there is barely any fringing in this extremely overexposed minute fraction of an image. relax and shoot some pictures. im afraid the internet madness about the m8 has people overly paranoid and has resulted in unprecedented pixel peeping on an unimaginable scale....b   Right on !  (actually, the example shows the M8 has LESS problem than many other systems!) Link to post Share on other sites More sharing options...
colorflow Posted January 25, 2007 Share #12 Â Posted January 25, 2007 Can you see it at 100%. I saw a red edge between high contrast areas and was visible in a 8x10 print. Search that thread under 'red edge'. Â Alan Link to post Share on other sites More sharing options...
B&W Posted January 25, 2007 Share #13  Posted January 25, 2007 Can you see it at 100%. I saw a red edge between high contrast areas and was visible in a 8x10 print. Search that thread under 'red edge'. Alan  I get that sometimes and especially in the OOF and high contrast aeries with my M8 Link to post Share on other sites More sharing options...
fotografr Posted January 25, 2007 Share #14  Posted January 25, 2007 Jaap,Thanks for the post. please see 400% enlargement of window in picture. As you see the white has a orange/purple tinge. Any suggestions haev you seen this before.  1.09 firmware. I will try IR filter next but not sure this will fix this as I understand this relates to other issues  You are joking, right? Link to post Share on other sites More sharing options...
woodda Posted January 25, 2007 Author Share #15 Â Posted January 25, 2007 Thanks for all the comments. Good to see it might not purely be a Leica traite Link to post Share on other sites More sharing options...
ptomsu Posted January 25, 2007 Share #16 Â Posted January 25, 2007 This discussion is really irreal! Nobody would do a 400% enlargement, if this is needed, then any camera in the area of 24x36 or whatever crop with around 10MP is the wrong equipment ;-(( Link to post Share on other sites More sharing options...
woodda Posted January 25, 2007 Author Share #17  Posted January 25, 2007 I think me mentioning the 400% enlargement was a distraction. You can see the orange tinge even at normal print size it was just it was easy to demonstrate on the enlargement. As it is on all the windows (4 stores and 3 windows on each story) it adds up and makes it more noticeable  Regards Link to post Share on other sites More sharing options...
wparsonsgisnet Posted January 25, 2007 Share #18 Â Posted January 25, 2007 Again, I think it's that the white area is overexposed and the "bloom" is being transmitted to the adjacent area. Link to post Share on other sites More sharing options...
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