How does Nikon D100 differ from Nikon F80 in AF speed, shutter lag and operational speed in general? I have the F80 and currently no opportunity to test the D100 but as I plan to buy this camera to add it to my film cameras, I'd like to know what can I expect from it in term of speed. Since I know the F80 I'd like to compare the D100 to this camera. Apart from speed I'm interested in any differences you could tell, apart from those obvious ones, of course (film/digital). I, for example, found out that where the F80 has button for flash exposure correction, the D100 has available light correction button, which unnecessarily complicates things when using both cameras simultaneously.