Regarding the 65mm lens for the Mamiya TLR... It is not too much wider than the 80mm lens, but sometimes, and often for the way I use the machine, it is just enough to get a group of 3 or 4 people in the frame without needing to back up too much. That may sound trivial, but think about it for a moment. When photographing groups of people it is often useful to use a bit of low power fill flash. Flash power drops off considerably with distance, and at low power settings you quickly run out of light before you back up enough with a longer lens. With a shorter lens, you wind up getting too close and with that comes the usual exaggerated noses, etc. So don't discount that focal length too quickly.