Originally posted by Viking42 Tony,
A few comments here for you to consider...
All of the cameras you are considering were made for professional use, and therefore were built to a higher standard than consumer grade 35mm cameras. They are inherently more robust and reliable. That said, I think provenance of an individual camera is probably more important in predicting reliability than model-to-model differences. If a camera was used by, say, a wedding photographer or other pro, it will have high mileage and will likely develop a problem sooner than one used by a hobbyist. The more you can learn about a camera's history the more assured you will be of getting a good one.
Re. Pentax 645, I have heard that they are all very reliable - both original and later N models. The N is more ergonomic with it's dial controls; has finer adjustment of EV compensation; and has a brighter viewfinder.
Mamiya Supers are reported to be prone to light leaks in the backs, so be aware of that when buying. In general, the Pro version is said to be even more robust than the Super. I believe both the Super and Pro have available waist level finders which might be very handy for low level or macro work, whereas the Pentax finders are fixed.
Re. your Rolleiflex, that is a cracker of a camera with an outstandingly sharp lens - either Planar or Xenotar - some of the best in medium format, from any maker (I own the one of each, so speak from experience). Have you considered buying a prism finder and a side grip handle for it? It really transforms the handling to be something close to what you might get with the 645's you're looking at. I have an older Vivitar grip for mine, and it makes it far less awkward and clunky to use. And if your light meter still works, then you'd have basic metering available. Granted, there are no interchangeable lenses here. As you say, they keep appreciating in value, so a CLA is a good investment. Food for thought....
Hope this helps!
Rgds,
Svend
Thanks for your input. It's hard to tell the history of a camera unless you're lucky enough to buy one from the original owner. But, generally pros don't baby their equipment, so if they used it allot, it shows.
I have that Vivitar grip. It has a removable mount and I have both the 35mm base and the square one for medium format. I even recently found the original cable release, which is tapered and has a clear plastic covering to stick into the grip.
The Rolleiflex is an awesome camera, I agree. I have the Xenotar 75/3.5. I used it for a number of years, then the shutter started sticking...just needed a CLA. I've already contacted Oceanside Camera (because of their long history with Rollei) and I'm looking at $600 for a reassembly and CLA, plus additional if any parts are missing (which I don't expect as I've got them all in bags by section). This winter I'm going to send it too them to fix no mater what the final cost. I see 3.5Fs going for $1300-$1500 and the price keeps going up. I never felt to desire for a prism as I like WL finders in general, probably from starting with an Exakta V with a WL when I was young. These days when you're looking down into a WL people around you don't know what you're doing..
I used to have a few Rolleiflex... Mostly Automat MX and MX-EVS. I even had a mint Rolleimagic with case at one point. You see some criticism of 4 element Tessar formula lenses...not sharp enough...soft corners..etc. You stop them down to f/8 and they're as sharp as can be.