Hi Alfred, enjoy your visit, thanks for coment!
Sharpen: After we processed whole image, we select third down (and the tree) and we have applied high-pass in green channel; in Lab color i have applied easy USM - lightness channel. Both procedures moderate, not to implement in an artificial image (look the tree). I will try.
I apologize to myself, i blame the lens. He-he!
.... no you didn't :) btw was probably looking at the tree and see how the leaves reflect light making it look over sharpened but is just the normal contrast !!!
.... btw I haven't played with LAB for a while but sure is a neat space, for some images is the only way to go !!!