Originally posted by Lowell Goudge marc, most of whay ou mention here is "fixing mistakes" color casts, blown highlights etc. much of that can be avoided with better planning on exposure.
That's not true. I chose my words carefully to describe things that can *not* be dealt with in camera.
A green spotlight, for example, will not be well corrected for using manual WB. nor will a red spot. WB controls just aren't sufficient for dealing with these kinds of color casts. And a shot with a green spotlight on part of the scene and a red spot on another certainly can't be corrected. Plus, it's often impractical to change WB on every shot when dealing with colored lights. When I'm shooting a concert, I might have one shot with a green spot and another with a red spot, taken a second apart. And it's not like one can run up on stage to soot a gray card. It's just not reasonable to expect that all color casts can be handled in advance and that failure to do so constitutes a "mistake"
As for highlight recovery, the only way to avoid blowing highlights is often to deliberately underexpose the rest of scene - in which case you'll then need to lighten the shadows. Either way, PP is required to get the look you want. You could try the D-range feature, but that's a one-size fits all solution - often one will have more specific needs than this.
And no camera I have ever heard of includes in-camera curves or local contrast enhancement controls. Al you get is a very rough "contrast" control - that' not *nearly* the same level of control. Again, given that there is no in-camera curves control - and it would be fantasy to assume one could be accurately pre-setting curves on a shot by sot basis - it's really inaccurate to refer to the application of a curve in PP as fixing a mistake.
Quote: I don't disagree, in recovery mode RAW is better for finer adjustments, but if you are close with your jpeg settings, it is pretty easy.
Ease isn't necessarily the issue - it's also effectiveness. No matter how you slice it, 8 bits is less than 10, 12, or 14. You've got less lattitude for change before artifacts appears.
Quote: in PSP X2, I can do a lot of things in 16 bit (contrast, color balance, curve adjustment etc) , but the noise reduction routine runs in 8 bit, so you have to reduce the image to 8 bit color first, before noise reduction.
Ah. I don't know anything about the specifics of PSP or LR regarding what operations are performed using how many bits. But I would point out it isn't necessarily just about number of bits - it could also be about whether the operation can be performed before demosaicing or not.