Originally posted by baronkatz
... I really love rangefinders and was thinking of getting a medium format RF but all the lenses are too slow and the results to my eyes don't look as stunning as the Pentax 67 shots I have seen.
Yes, the 105/2.4 is pretty unique in that regard. A really good lens is the M* 300mm ED IF. But pretty touchy to shoot without using a big tripod and a monopod for the cantilevered camera body due to the shutter curtain inertia on a Pentax 67. But I highly recommend it.
I'm not sure what kind of pictures you've been looking at but one thing I picked up from a guy over on the large format forum was using the 105/2.4 with the #1 extension tube for head shots. It emulates the shallow DOF and shooting style often done by people using large format cameras.
Here are a couple of examples of what I mean. These were shot at f2.8 and and I use a waist level finder on my Pentax 67 because, like the 500C/M, it has a magnifying glass for critical focus and shows the needed 100% view for the following type of head shots:
105.2.4 + #1 extension tube example 1 105.2.4 + #1 extension tube example 2