jrc Posted November 13, 2006 Share #1 Posted November 13, 2006 Advertisement (gone after registration) I've been messing around in Adobe Lightroom with the M8 magenta problem, using an IR-reflective black cloth and a GretagMacbeth ColorChecker in an effort to fix some of the magenta problem. For those of you who don't know about Lightroom, it is in a public beta, but getting fairly advanced. You can download a free copy of it, for either PC or Mac, here: ttps://www.adobe.com/cfusion/entitlement/index.cfm?e=labs%5Flightroom It will import M8 RAW files. After you import a RAW file into Lightroom, go to the Develop module (you will see the word "Develop" on the top right of the page -- click on it.) If you then click on the eye-dropper color picker (you may have to click on a drop-down triangle to find it), and click the eyedropper on the magenta-shifted fabric or whatever, you are then selecting that color as a neutral. You will at that point see it shift to black, although your blacks will stay black. Other colors, however, will shift to a greenish hue. I've been staring at this computer too long to gt this right, but what I did was then go down to the color selections, which are halfway down the right side of the Lightroom page, and adjusted the green sliders under hue, saturation and luminance. I went to -15 on Hue, -24 on Saturation, and -14 on luminance. That seemed to get me fairly close to real-world colors; I would give it some additional tweaks if I wasn't developing a headache from being, already, welll over-tweaked personally. I should note that I was working under a combination of different incandescent lights, so the beginning color was probably pretty weird. And I doon't quite understand how a routine like this would work for anything other than one given set of lighting... I hope somebody else with an M8 and Lightroom will try this. Lightroom, if you don't have it, is a very interesting program for managing and developing RAW files. It is intuitive and easy to use. There are tutorials provided by Adobe on their website. The current Lightroom Beta is good for another three months and you can get it for free. I, of course, have nothing to do with Lightroom or Adobe & etc., except that I get overcharged for their other products. 8-) JC Link to post Share on other sites More sharing options...
Advertisement Posted November 13, 2006 Posted November 13, 2006 Hi jrc, Take a look here M8/Lightroom/Magenta . I'm sure you'll find what you were looking for!
Peter41951 Posted November 13, 2006 Share #2 Posted November 13, 2006 Brilliant. You're a star. On Saturday I tried for ages to get this result myself without any success. Link to post Share on other sites More sharing options...
jrc Posted November 13, 2006 Author Share #3 Posted November 13, 2006 Yeah, well, I'm not sure it's going to work for anyone else. Let me know how it comes out. JC Link to post Share on other sites More sharing options...
Peter41951 Posted November 13, 2006 Share #4 Posted November 13, 2006 Your settings worked perfectly for a daylight shot. Artificial light shots will need more tweaking. Link to post Share on other sites More sharing options...
Peter41951 Posted November 13, 2006 Share #5 Posted November 13, 2006 Is there any way to get Lightroom to apply another camera's profile to an M8 file? Link to post Share on other sites More sharing options...
robsteve Posted November 13, 2006 Share #6 Posted November 13, 2006 Is there any way to get Lightroom to apply another camera's profile to an M8 file? No Link to post Share on other sites More sharing options...
Michael Reichmann Posted November 13, 2006 Share #7 Posted November 13, 2006 Advertisement (gone after registration) No, but... You can save an adjustment like this as a Preset and then apply it instantly to as many images as you wish at any time in the future. Michael Link to post Share on other sites More sharing options...
Peter41951 Posted November 13, 2006 Share #8 Posted November 13, 2006 Thanks. Artificial light photos seem more difficult to rebalance. Link to post Share on other sites More sharing options...
jrc Posted November 13, 2006 Author Share #9 Posted November 13, 2006 I think artificial light is the big problem -- depending on what the exact mix is, and how much IR a light puts out. I wouldn't doubt that studio pros, who control the light so carefully, could come up with a batching fix, but the rest of us, who may be shooting by anything from candle light to stadium lights, might have to go into each group of photos depending on what light they were shot under... I do think Lightroom warrants more experimentaation, especially since it's currently free. I would love to see the C1 adjustments, which Jamie says look like they might be universally applicable, but I know nothing at all about C1. JC Link to post Share on other sites More sharing options...
carstenw Posted November 13, 2006 Share #10 Posted November 13, 2006 Hmm, I am trying to do this, but I just can't get the natural colours back. Does anyone have a workflow for setting the HSL sliders to get back normal colours? I am not convinced that this is the correct way to do it in any case. It seems to me that what is needed is a camera profile which leaves almost all colours as they are, but gives special treatment to a very few special shades of dark red. Both the white balance and the HSL sliders affect colours globally. I tried the values you listed, but was still left with a very strong green cast in a picture I have, taken inside, by indirect daylight only. How does one create camera profiles and get Lightroom to use them for the M8? Link to post Share on other sites More sharing options...
Peter41951 Posted November 13, 2006 Share #11 Posted November 13, 2006 Not sure I've understood. If you want the original file's colours back , press RESET at the end of the develop section. The one outdoor photo I've worked on has given excellent results, well, as good as PS replace colour, anyway. Link to post Share on other sites More sharing options...
Peter41951 Posted November 13, 2006 Share #12 Posted November 13, 2006 To create a profile or preset you click ADD on the bottom left pane in develop. You will get a big window of check boxes. Adobe - Lightroom Beta General Discussion is where I got the info. Link to post Share on other sites More sharing options...
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