: I get it now. Sorry for the stupidity on my part. I just had to visualize it as a sensor passing through the middle of the image circles of a 35mm and 645 format camera, respectively. The portion of the 645 circle will certainly be magnified. Indeed, my ratios apply for determining format equivalence, but not when mixing the formats. Often the simplest things escape us and confuse. Well, I suppose I have a pretty nice normal perspective piece of glass with my 35mm mamiya lens! I was hoping I could save money on a wide angle...damnit. :) It's OK Trevor, the whole marketting of digital has confused more than a few people. Unfortunately the photo magazines do little to help. The publications of yesteryear that did truly in-depth analysis of equipment, lenses etc with very good explanations and educational articles seem to have evaporated in favour of what really amounts to junk rags with lots of ads, often disguised as articles. These magazines did a lot to educate us photographers and set us on a good path. My pet hates re digital: mag factors fix it after the shot no filters needed it's easier it's quicker more megapixels=better in camera curves algorithm magic lattitude (jpeg/raw/tif) colour profiling for printing ..and there's more confusion to come ;) k
