On Sun, Feb 19, 2012 at 7:56 PM, Larry Colen <[email protected]> wrote: > In lightroom (and I imagine PS camera raw), what is the difference between > the exposure slider and the brightness slider? > > I expect that exposure is just a linear multiplier on the raw value, the > slope of the line as it were, and the blacks slider is the "b" of the y=mx+b > of a linear conversion from raw to final. > > I can't figure out what the brightness slider does. It's odd that in library > mode, if you click on brightness twice, it seems to go to a default of 0, > while in develop mode, clicking on it twice seems to set it to 50. > > I'd actually be interested in seeing a simple description of the mathematical > transforms of each of the lightroom exposure sliders, so I could better > understand what I'm actually doing when I twiddle and frob them.
I think its interesting/odd that when I click the "auto" develop button in LR on my jpegs it always adjusts the Brightness slider but not the Exposure slider. This may be simplistic, but that seems to tell me that I should be using Brightness instead of Exposure most of the time. --------------------------- Sam -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
