Ok, I hope someone knows this, because a lot of you are using Lightroom:
I'm preparing to switch from Aperture to Capture One. For B&W conversion, CO doesn't have a channel mixer anymore, but only this B&W conversion tool thing that's also used in Photoshop ("Black & White" panel) and in Lightroom.
Now, this thing mixes up the world of subtractive (YMC) and additive (RGB) logic, six sliders. I get that each one of these sliders touches the "sensitivity" for the respective color. But that doesn't help me, because I need to understand the logic that's behind this thing. A channel mixer is very intuitive, because it simply mixes the three "channels" of the negative, just like you could back in the analog world (well, theoretically, but that's another discussion).
If it was YMC, I'd be ok with that, too, because it's simply the complementary of RGB, and the logic of filtering the negative to the positive. Doesn't matter.
With this "new" tool, though, what the heck does it actually do? So let's say, a "zero all sliders" setting corresponds to a certain mix of the channels, in case of CO, it's 30% red, 60% green, 10% blue. Now, when you move the "yellow" slider (not included in the logic of RGB), what happens? When you move the "green" slider, what happens?
And most of all: How do you achieve a 100% red-, green- or blue-channel conversion with this thing?
Does anyone happen to know of a documentation of this strange algorithm that somehow explains what's going on? As Photoshop and Lightroom are using it as well, chances may not be so bad, but I couldn't find anything until now. (I'm not talking about those "How-to-get-nice-black-and-white-pictures" tutorials that just tell you how to move some sliders.) I really need to understand this thing as I want to be able to make B&W conversion like I did before.
Thanks very much for any help on this, folks!