Jim Reed , Jun 24, 2002; 03:16 p.m.
Obviously, the choice between the 80mm and the 100mm would be shaped by how you intend to use the camera most of the time. As one who recently purchased the 501CM kit with the 80mm Planar, I can tell you that I am very pleased with the 80mm (my only MF lens at this point) and find it to be an excellent "general purpose" lens.
With my 35mm camera, the 50mm lens is my default lens; likewise, with the Hassy I suspect that at least 80% of my shooting could be done well with the 80mm normal lens. Were I to need a longer lens (and I would get a wide angle first), I would look to the 120mm. I tend to agree that the 50/80/120 would be an ideal set up. I would suggest starting with the 80mm as the base lens -- and the 501CM is a great camera.