The bottom loading of a IIIF is a whole other thing and not to be compared with an M3. It is still slow even if you do all the things that make is faster. Even then doing it slowly is the only way to ensure the film is engaged over the sprocket teeth because the camera will fool you at some time or other into thinking everything is OK. Even Cartier Bresson has images reproduced with the sprocket holes in evidence at the edge of the frame.
Originally Posted by puketronic
But a IIIF is much smaller than an M3, and with a collapsible lens is truly a pocket camera (coat pocket). But the finder is squinty, an accessory finder is better (for whatever focal length, even 50mm), but then the size of the overall package starts to increase and you are back to an M3..... I think if you work with a IIIF, and forget about comparing it to an M3 you may find it the perfect camera, but I think it is one of those rare camera's that I think you need to try for yourself. The ergonomic's will either have you banging your head against the wall, or loving it beyond all other things.