I currently shoot film, and have no desire to go digital for landscape - but what about my wildlife work? I always intended to buy a (Nikon) 500mm f4, backed up by a 300mm f4 - both used with a 1.4xTC. This is an expensive and heavy package. So, now I am considering getting a D70 camera, a 200-400mm f4 zoom and a 1.4TC. I am assuming that the digitial crop factor will allow me to cover the same focal distances as the package above (but cheaper and less weight). Is this correct? Will both packages cover the same focal distances? Also, what size would a print have to be before I noticed the differences in optical quality between film and digital (shooting in RAW)? And, finally, shooting in RAW, is it possible to get, say, 10 exposures in 10 seconds? Thanks for your help - this is a big decision!