Close, but not exactly exactly - at least according to my experience and as seen in the little gallery I just put up:
http://home.earthlink.net/~my-pics/gallery/index.html Shel > [Original Message] > From: Rob Studdert <[EMAIL PROTECTED]> > Using the Luminance channel only in Lab format gives exactly the same result as > converting to grayscale. Desaturating (in PS) without adjusting the other > sliders gives a completely different weight to the colours in the grayscale > conversion.

