Lightroom RAW conversion problem with violet/magenta highlights in Canon 6D files with Adobe standard profile

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Lightroom RAW conversion problem with violet/magenta highlights in Canon 6D files with ADOBE standard profile. Color turns out wrong (blue) and way too dark, transition to white is everything but smooth. Sample file (w/ correct DPP conversion) here:
http://www.hy-photo.de/img/6D_RAW_mag...

Can this be fixed? I like the color rendering this profile, but I cannot use it for pictures with magenta light sources in them.
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canadien71 .

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Posted 3 years ago

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Steve Sprengel, Champion

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I don't know if this is a bug or if it is just a problem with the colors and tones that the Adobe Profile tries to get right vs others that it lets go wild. It would help to have a shot with another mid-tier DSLR to see if the problem is across multiple camera models. I suspect it is because I've seen other cameras that also have problems with blue and purple lighting. You're lucky in this situation because you can actually switch to another camera-match profile and have the abrupt transitions go away.

For anyone else reading this thread, here is a side-by-side of the Adobe rendering that has severe transitions around the bright light sources and the Canon rendering that is smooth, similar to some of the camera-match profiles:
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canadien71 .

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I noticed that with the Adobe profile you get a lot of color back in otherwise overexposed parts of the image. In most cases this works very well and the effect can easily be managed by adjusting the vibrance and saturation sliders. The exception are these magenta/violet tones. I was a bit shocked seeing the Lightroom conversion. At first I thought there was a problem in the 6D's RAW files, but at least the embedded preview looked fine, as did the DPP conversion.
But it's not just the transition problem, there's also one with the color. The DPP conversion on the right shows the actual perceived color of the illumination used. The Adobe profile seems to drift into the blues as well as rendering it a fair bit too dark in places. If you have a purple stage light performers very often turn out like blue man group members.
If you look at the spot on the ceiling above the light the result is muchg more in line with the other colors, maybe because there's a good portion of red involved.

If it helps: I might be able to get access to these lights, but can only test my 1D4 and a PowerShot G1X.
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Steve Sprengel, Champion

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If you can retest with all three cameras to compare that would be interesting. Besides these shots where the lights are too bright and become clipped to white, try some exposures that are very dark where the colors don't shift due to channel clipping.

It seemed like the Camera Faithful color profile had the least discontinuities.