Feature Request: Add Photoshop's B&W channel mixer to Lightroom

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  • Updated 2 years ago
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If the black & white channel mixer that is currently only found in Photoshop were added to Lightroom, it would save a lot of workflow time for serious black & white photographers.  Channel mixer is by far the best way to convert RGB color to B&W, when maximum creative control and high quality output are your goals.  Since channel mixer is not available in LR, you must export an RGB color file and then open it in PS to do your conversion.  Although LR has a B&W color editing panel, strong adjustments made there produce noise and halos.  If the PS channel mixer were added to LR, it would be possible for black & white photographers to fine tune their B&W conversions while making other LR adjustments at the same time.  The end result would be higher quality B&W exports in less time.
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Joel Pickford

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Posted 2 years ago

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john beardsworth

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Wouldn't their time be better spent fine tuning the B&W panel to avoid producing haloes and noise when some colour ranges have been pushed beyond their limits? As a serious B&W photographer, I've no use for the Channel Mixer in Lightroom, and I abandoned it in Photoshop when it introduced its B&W adjustment layer.
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Peter Vogel

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My experience with the LR black and white adjustment panel ist, that it depends on the camera chip and ASA setting, if and how much noise will be produced. If that is much better in Photoshop, I see no reason why Adobe could not reach the same results in LR?

If, on a nice blue sky in a landscape photo, I push the blue slider for an almost black sky (like a red #25 filter), I do get some slight noise, which can be eliminated by using the noise sliders. I will try now, if PS does a better job on that, since I have done all my black and white conversions in LR.
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if you're seeing noise and halo's when converting in LR, try adjusting the color noise slider. This is an undocumented feature for reducing the artifacts which the conversion produces.

As for the channel mixer in LR, i think it's totally unnecessary. FYI, you can use all the other tone controls aside from the HSL panel when creating a b/w. White balance, Calibration, etc. are all there to help create a toning which is not possible if using a Channel Mixer.