At 28mm it's usually very easy to get everything you need in the frame, the DOF is large, and the parallax is essentially negligible. Basically any 28mm lens will work just great with any 28mm finder - that's been my experience! At 50mm and longer, external finder lens match is a little more challenging, but I frequently use lenses to 135mm with no real problems.
What's interesting is that in the modern RF world, 100mm or so is often considered the practical limit for rangefinder lenses, which is one reason 135mm lenses are fairly inexpensive on the used market today and no longer made new. However before the advent of really effective 35mm SLR's (by the late 50's, early 60's) longer lenses were often used on rangefinders without mirror boxes, particularly in the 1930's (keep in mind the 35mm Exakta did not appear until 1936). For instance there was a 180mm f6.3 lens made for the Contax which used an external finder scope like a telescope. I've shot with this lens on Contax IIa and it works great. Similar lenses were made by third parties for the Leica thread system, all of which are rarities today. But, perhaps I'm drifting a little off topic... :-)
Originally Posted by msbarnes
Last edited by davela; 10-25-2012 at 02:03 PM. Click to view previous post history.