j. borger Posted November 5, 2006 Share #1 Posted November 5, 2006 Advertisement (gone after registration) At first i was chocked seeing the M8 color files with magenta & purple colorcasts all over the place. But I think with some tweeking the M8 is capable of producing some beautiful color. At least i like the results below .. all with the noctilux at f1.0 this morning. 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/8566-m8-color/?do=findComment&comment=84682'>More sharing options...
Advertisement Posted November 5, 2006 Posted November 5, 2006 Hi j. borger, Take a look here M8 color. I'm sure you'll find what you were looking for!
j. borger Posted November 5, 2006 Author Share #2 Posted November 5, 2006 I am no colorexpert at all.. but when using C1 with the M8 profile .. the purple/ magenta is all over the place .... which is far less the case if i use the simple Adobe RGB profile. This are 100% crops look at the magenta Halo around the fingers in the 2nd picture. Nr 1 is converted with adobe RGB, Nr 2 with M8 profile. 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/8566-m8-color/?do=findComment&comment=84688'>More sharing options...
j. borger Posted November 5, 2006 Author Share #3 Posted November 5, 2006 So after 2 days working with the M8, reading about all the issues AND running into them myself .... i still have good hopes most (if not all) issues, can be solved with firmware & software upgrades. Not sure about the banding/ striping .. which i ran into on a continuous basis too if shooting candles or lights in the dark at higher iso. Link to post Share on other sites More sharing options...
sdai Posted November 5, 2006 Share #4 Posted November 5, 2006 Bokeh in the second and third shots aren't very pleasing but it's great to see that the Noct can be focused accurately in all your pictures, Han - the first one looks especially nice - with the layers. Did you process the files with their default settings in both C1 and ACR? ... Link to post Share on other sites More sharing options...
j. borger Posted November 5, 2006 Author Share #5 Posted November 5, 2006 Hello Simon, Sloppy quick processing of some quickies ... like described these are converted in C1 using the Adobe RGB profile ...because i do not like the the specific M8 profile ... i get those nasty Magenta casts and need far more tweeking/ colorcorrecting using that profile to get there. I will go back to B&W as soon as i get the JFI B&W profiles... but felt the need to dig a bit in the color because of all the reported issues. Focussing The Noctilux and 75/ 1,4 wide open (and close up).... is a dream .... i use the 1,25 vf magnifier and have not missed a shot yet. The 75 Summilux behaves beautiful ...... you'll love it. I think i'll glue that magnifier permanently ..... works fabulous if you do not shoot wider than 35mm . All initial troubles just software related .. or do we have to fear Simon?? Kind Regards Han Link to post Share on other sites More sharing options...
pascal_meheut Posted November 5, 2006 Share #6 Posted November 5, 2006 I'm not sure I understand. First, the magenta issue appears mainly under artificial light and especially at very low color temperature, not under daylight. 2nd, the file should look exactly the same under Photoshop whether you convert it to AdobeRGB or you embed the M8 profile. Third, to post on the Internet, you should convert to sRGB and once again, the files should look the same. Link to post Share on other sites More sharing options...
jrgeoffrion Posted November 5, 2006 Share #7 Posted November 5, 2006 Advertisement (gone after registration) What Pascal said. Link to post Share on other sites More sharing options...
eronald Posted November 5, 2006 Share #8 Posted November 5, 2006 The magenta fringing is due to the lens+sharpening combo you are using. If you're lucky, some of this is uncorrected aberration that you can get rid of in the PS Raw converter - try it. Edmund Link to post Share on other sites More sharing options...
j. borger Posted November 5, 2006 Author Share #9 Posted November 5, 2006 I'm not sure I understand. First, the magenta issue appears mainly under artificial light and especially at very low color temperature, not under daylight. 2nd, the file should look exactly the same under Photoshop whether you convert it to AdobeRGB or you embed the M8 profile. Third, to post on the Internet, you should convert to sRGB and once again, the files should look the same. What i did for the 2 100% crop samples showing the purple is as follow ,,,, - convert with C1 LE ... colormanagement settings: cameraproduct M8; camera: Adobe RGB (as colorprofile instead the obvious choice: the M8 profile) -------- output to Adobe RGB - open converted raw image in PS .. resize for web and convert to srgb before uploading here picture two Exactly identical with the exception that in c1 LE i set cameraproduct: M8 and camera also m8 (the m8 colorprofile) .. (the settings as should be) So my impression is the M8 cameraprofile for C1 LE creates the purple/ magenta casts we see, at least to a certain degree. Please correct me if i am wrong .... because Capture one is new to me! Link to post Share on other sites More sharing options...
j. borger Posted November 6, 2006 Author Share #10 Posted November 6, 2006 I got some requests to share the raws...... here is nr 1 attached L1000163.DNG Link to post Share on other sites More sharing options...
pascal_meheut Posted November 6, 2006 Share #11 Posted November 6, 2006 You should never change Camera Profile to something like AdobeRGB. You should stick to Leica M8 Generic, maybe play with Leica R8/R9 as Guy Mancuso suggested. Link to post Share on other sites More sharing options...
j. borger Posted November 6, 2006 Author Share #12 Posted November 6, 2006 And another one L1000166.DNG Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted November 6, 2006 Share #13 Posted November 6, 2006 Agree Pascal always keep the camera profile to a camera and in this case M8 generic or if you are running a bit magenta the R9 genric runs a little less magenta and may solve the magenta cast folks are reporting and may avoid a custom profile. i tried this on DMR files and when i switched to the M8 generic the magenta went up, so M8 users may want to try the R9. Please report on this since i have no M8 yet to test it. Link to post Share on other sites More sharing options...
j. borger Posted November 6, 2006 Author Share #14 Posted November 6, 2006 You should never change Camera Profile to something like AdobeRGB. You should stick to Leica M8 Generic, maybe play with Leica R8/R9 as Guy Mancuso suggested. Pascal, Only reason i did that was to come to the same conclusion as Guy ... the M8 profile gives the magenta cast to a large extent ... any other profile works better. Even those for the Canon cameras and of course that of the R8/ R9. I a m not promoting this as workflow. So for now my conclusion is .. there is only 1 real issue left .. the banding! All other issues are fixable with proper profiles & firmware change. Why should i have to stick with the M8 generic profile by the way if that profile does not give me the color i like Is there a specific reason to do so? Link to post Share on other sites More sharing options...
pascal_meheut Posted November 6, 2006 Share #15 Posted November 6, 2006 BTW, I downloaded your files and the colors look ok to me. The reds and magenta may be little bit oversaturated but as Guy said, this is easy to fix. Nothing like what I experienced at 2400K where they were out of control and blues were totally under-saturated. Link to post Share on other sites More sharing options...
pascal_meheut Posted November 6, 2006 Share #16 Posted November 6, 2006 Why should i have to stick with the M8 generic profile by the way if that profile does not give me the color i like Sure but by choosing a profile not even remotely correlated to the color space of your camera like AdobeRGB, you will end up getting colors you like for a specific picture by change. Next picture may be another story. I think a better workflow is to stick to profiles related to your camera or close (like the R8/R9), tweak them if you need and do other color related corrections using the appropriate tools. Link to post Share on other sites More sharing options...
j. borger Posted November 6, 2006 Author Share #17 Posted November 6, 2006 BTW, I downloaded your files and the colors look ok to me. The reds and magenta may be little bit oversaturated but as Guy said, this is easy to fix.Nothing like what I experienced at 2400K where they were out of control and blues were totally under-saturated. I have to agree .... these colors are far nearer to what it should be than those below 2400k as you say. How about that Magenta Halo in the 100% crops ...?? Link to post Share on other sites More sharing options...
j. borger Posted November 6, 2006 Author Share #18 Posted November 6, 2006 Sure but by choosing a profile not even remotely correlated to the color space of your camera like AdobeRGB, you will end up getting colors you like for a specific picture by change. Next picture may be another story. I think a better workflow is to stick to profiles related to your camera or close (like the R8/R9), tweak them if you need and do other color related corrections using the appropriate tools. Ok that makes sense .. thanks .......... Just got into this because by just playing around with these prpofiles i saw the magenta/ purple disappear. Link to post Share on other sites More sharing options...
jrgeoffrion Posted November 6, 2006 Share #19 Posted November 6, 2006 The problem shows up with halogen lamps (and maybe others) because when one performs a white balance, he/she essentially boosts/decreases the blue and red pixels of the sensors. For example, if the blue channel is boosted (which happens with low tungsten lighting), any error in the profile would be multiplied and amplified for certain colors. On the other hand, if you were in the shade, if the profile would not be "perfect", a different color shift could appear. In other words, most likely that with a more accurate color profile, this issue will go away. Link to post Share on other sites More sharing options...
pascal_meheut Posted November 6, 2006 Share #20 Posted November 6, 2006 IHow about that Magenta Halo in the 100% crops ...?? I do not know. Because they are only in the out of focus area, I would tend to think that this is due to the Noctilux but I'm not sure. Link to post Share on other sites More sharing options...
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