Guest xxl-user Posted November 4, 2006 Share #101 Posted November 4, 2006 Advertisement (gone after registration) you have to put some black tape around the lights in your pictures and banding will be a problem no more! Link to post Share on other sites More sharing options...
Advertisement Posted November 4, 2006 Posted November 4, 2006 Hi Guest xxl-user, Take a look here M8 vs DMR, very different colors in Capture One. I'm sure you'll find what you were looking for!
robsteve Posted November 6, 2006 Share #102 Posted November 6, 2006 And now, the M8 file. As you can see, the background is redish as the skin tones. Look at the M2 to M4 and D7 to J7 patches for instance. Anybody has an explanation? I had such oversaturated reds at first when using ACR with the DMR, 1 year ago but then C1 came and "nailed the colors" as Guy Mancuso said. Now, ACR still gives horrible colors with the M8 files but C1 seems not as good as it could be too. Pascal: I played around with your test chart DNG and without any adjustments, the white balance was not right to begin with. I then began to do a bit of thinking on the subject. Your white balance that the DNG of the test chart was shot with was way off to begin with. I am wondering if the image compression happening in the DNG writing stage may have an efffect. What I am suggesting is to shoot the same card, but prior to shooting it, set a manual white balance by shooting your whitebal card in the same light. Then, put your chart there and shoot it using the manual/custom white balance that your M8 was just set to using the whitebal card. Link to post Share on other sites More sharing options...
pascal_meheut Posted November 6, 2006 Author Share #103 Posted November 6, 2006 I did these tests already, shooting with different white balances set on the camera. In the end, the raw file is basically the same and it makes no difference. Link to post Share on other sites More sharing options...
robsteve Posted November 6, 2006 Share #104 Posted November 6, 2006 For what it is worth, here is what I got out of Lightroom. I am starting with Pascal's conversion. Pascals: My conversion in Lightroom, just clicking on the lightest grey square for balance. Here I tweaked a DMR camera calibration I use in Lightroom Link to post Share on other sites More sharing options...
pascal_meheut Posted November 6, 2006 Author Share #105 Posted November 6, 2006 Yes, the usual oversaturation of red and magenta in Adobe products when it comes to DMR and M8 files... Link to post Share on other sites More sharing options...
robsteve Posted November 6, 2006 Share #106 Posted November 6, 2006 Yes, the usual oversaturation of red and magenta in Adobe products when it comes to DMR and M8 files... I just changed the last one. I have a problem using that chart, as it took a while to find the colors. I am used to looking at an it8 chart where the RGB and CMY are easier to follow. Link to post Share on other sites More sharing options...
robsteve Posted November 6, 2006 Share #107 Posted November 6, 2006 Advertisement (gone after registration) I just put the M8 calibration from the chart into a daylight shot and it looks awful. The DMR does not respond that way. A ACR camera calibration for the DMR seems to work well across most lights. There must be a spectral sensitivity going on there. Pascal, does you halogen light have the little glass protection shroud over the bulb? This cuts down on some of the extra spectrum from the halogen. I can't remember whether it cuts out the UV or Infrared. Link to post Share on other sites More sharing options...
pascal_meheut Posted November 6, 2006 Author Share #108 Posted November 6, 2006 Yes, it does. I can try without it. Link to post Share on other sites More sharing options...
robsteve Posted November 6, 2006 Share #109 Posted November 6, 2006 Yes, it does. I can try without it. I wouldn't waste any more time on it. I think this is something that has to be dealt with by Leica or Phase One or both. Link to post Share on other sites More sharing options...
like_no_other Posted November 6, 2006 Share #110 Posted November 6, 2006 Can't you simply shift the green-magenta offset in your M8's? Link to post Share on other sites More sharing options...
robsteve Posted November 9, 2006 Share #111 Posted November 9, 2006 I just put the M8 calibration from the chart into a daylight shot and it looks awful. The DMR does not respond that way. A ACR camera calibration for the DMR seems to work well across most lights. There must be a spectral sensitivity going on there. Pascal, does you halogen light have the little glass protection shroud over the bulb? This cuts down on some of the extra spectrum from the halogen. I can't remember whether it cuts out the UV or Infrared. I know I am quoting myself here, but I think the IR sensitivity is probably the problem. Pascal, is there a chance you could reshoot with a IR blocking filter on the lens, such as a B+W 486, tiffen hot mirror filter, or some other brands equivalent filter? Link to post Share on other sites More sharing options...
pascal_meheut Posted November 9, 2006 Author Share #112 Posted November 9, 2006 Yes, I saw the the thread with the pictures shot with an IR blocking filter on the lens and I agree: IR sensitivity is probably the issue here too. And even if it can be solved with custom profiles, it would be a better solution to address the problem at the source. I've lent my M8 to a friend who wants to test it but I'll try this solution next week. If my testing is still relevant at this time of course, which I doubt. Link to post Share on other sites More sharing options...
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