Pinphot
Established
Hello,
this is my first post in this forum. I have recently bought a second hand r-d1 and I'm really enjoying using it apart from the Magenta/IR cast raising it's head fairly frequently. I did a job yesterday and the cast raised it's ugly head quite badly on the jacket of the chap I was photographing. I did a rough and ready desaturate in the magenta channel before wiring to the client, which was not ideal but was better than having the cast and probably wouldn't matter too much in Newsprint anyway.
Had a fiddle with the files last night, it appears that the cast almost entirely consists of magenta. The fix I came up with, which seems to work extremely well is to open the file in PS, then go into Image:adljustement:'selective color', choose the magenta channel and then whack the magenta channel all the way to left, (-100). Next, I went into the blue channel in hue/saturation and set the hue to -10. Bingo, the IR cast gone and very little, if no damage done to the other colors in the image apart from pushing vivid blues slightly towards the cyan. I have also adjusted the levels in the second image to slightly clean up the touch of yellow in the brickwork on the original file. I've tried this fix on some other photos, messing around this afternoon and the fix worked well on a black waterproof jacket and strangely, a blue linen shirt? I wonder if there is as much a problem with how the camera implements color management as IR? Obviously, there will be places where this won't work, (such as maybe a convention for Goths), but this seems to be the most effective software fix I've found without messing with alternative profiles which I don't want to do as my clients generally stipulate an Adobe RGB color space for delivery of digital files. Strangely, discarding the embedded file and working on an unprofiled file seems to address the cast too, but the moment the Adobe space is assigned, the cast reappears. I have a three b+w 486 filters on order, but don't hold out much hope for getting them soon.
Incidentally, I have tried out my suggested fix on some of the M8 files sloshing around the net and haven't had too much success. Whereas the r-d1 cast appears almost exclusively magenta, the M8 files seem to have a lot of red too, and I don't really want to go there. But hey, I don't have to.
Any feedback from other forum members trying this fix would be appreciated.
Cheers, Mark.
this is my first post in this forum. I have recently bought a second hand r-d1 and I'm really enjoying using it apart from the Magenta/IR cast raising it's head fairly frequently. I did a job yesterday and the cast raised it's ugly head quite badly on the jacket of the chap I was photographing. I did a rough and ready desaturate in the magenta channel before wiring to the client, which was not ideal but was better than having the cast and probably wouldn't matter too much in Newsprint anyway.
Had a fiddle with the files last night, it appears that the cast almost entirely consists of magenta. The fix I came up with, which seems to work extremely well is to open the file in PS, then go into Image:adljustement:'selective color', choose the magenta channel and then whack the magenta channel all the way to left, (-100). Next, I went into the blue channel in hue/saturation and set the hue to -10. Bingo, the IR cast gone and very little, if no damage done to the other colors in the image apart from pushing vivid blues slightly towards the cyan. I have also adjusted the levels in the second image to slightly clean up the touch of yellow in the brickwork on the original file. I've tried this fix on some other photos, messing around this afternoon and the fix worked well on a black waterproof jacket and strangely, a blue linen shirt? I wonder if there is as much a problem with how the camera implements color management as IR? Obviously, there will be places where this won't work, (such as maybe a convention for Goths), but this seems to be the most effective software fix I've found without messing with alternative profiles which I don't want to do as my clients generally stipulate an Adobe RGB color space for delivery of digital files. Strangely, discarding the embedded file and working on an unprofiled file seems to address the cast too, but the moment the Adobe space is assigned, the cast reappears. I have a three b+w 486 filters on order, but don't hold out much hope for getting them soon.
Incidentally, I have tried out my suggested fix on some of the M8 files sloshing around the net and haven't had too much success. Whereas the r-d1 cast appears almost exclusively magenta, the M8 files seem to have a lot of red too, and I don't really want to go there. But hey, I don't have to.
Any feedback from other forum members trying this fix would be appreciated.
Cheers, Mark.
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