Hi - I'm new to this forum and would appreciate whatever advice I can get. I recently purchased a second hand Mamiya 645 AFD with a Leaf Valeo 17 Mpa back. I love everything about it (so far), with one exception - the sensor size conversion factor. As most of my work is architecture, I rely heavily on my 35mm lens. However, this converts to approximately a 46mm lens, due to the smaller sensor size. I cannot afford either the new 28mm lens or a 22Mpa back which is 'almost full-frame', so what are my alternatives? I'm considering a wide angle lens from an RB/RZ 67 or perhaps even a Fuji lens from a GX680, but there would be focusing issues as each of these cameras uses a bellows. Could this be overcome? What about a 43mm lens from a Mamiya 7? The quality, I believe, is simply superb; could it be adapted to work on my 645? What would be the issues? The mirror of the Mamiya can be locked up if that is a problem, after all the 43mm lens comes with its own viewfinder that could presumably be used. It would be like a Hassy SWC. Does the Mamiya 43mm shutter have to be used or could it be set on T and the camera body shutter used instead? I don't mind working in manual mode for focusing or aperture adjustment, I just want a decent wide angle lens. Does anyone have any comments on this suggestion or any alternative ideas. Thanks in advance for your thoughts.