I've decided to finally get more serious about monitor calibration. I've calibrated my MBP by eye, but my colors are yellowed in photo samples from my lab of choice. So I am going to purchase a Spyder 2 Express for my MBP.

I'm curious how people deal with the automatic screen dimming that late 2007 and up MBP do to compensate for ambient light conditions. Do you turn that off while working with photos? The dimming must effect screen colors.

Also, should I re-calibrate my screen often for different ambient light conditions? My MBP is in the kitchen with many windows, so light conditions vary throughout the day. I know that optimal conditions for a digital "darkroom" are a dark room with consistent light conditions.

Thanks for any advice.