Has anyone tried adapting Mamiya 645 lenses?
I have. Some work really well. Others are prone to flare. If you are interested in specific lenses, I can tell you how I feel about them, provided they went through my little hands.
I've used the Mamiya 645 system extensively in the film days. I thought at the time that the lenses were quite good, hence, I wondered why everyone was using Pentax 645 lenses, rather than Mamiya.
Your question is interesting because I started with Mamiya lenses and I progressively moved to Pentax 67 zooms and later to P 645 zooms. I'm not sure I know what I am talking about, but for what I see, in their development, Mamiya soon went with a body command for the AF lenses and suppressed the aperture ring. So the best Mamiya lenses are ruled out, and we are left with pre-AF era lenses. Some of them are really good though. The A lenses are excellent, and the N versions are slightly superior to the early C with silver ring.
But when Pentax launched their 645 system, many years after Mamiya if I remember right, they supported it with excellent lenses endowed with the SMC coating, manual first and later AF. They eventually went without aperture ring too for their digital cameras.
Some manual Mamiya lenses are really great though, for instance the 80mm f2,8 N, the 80mm f1.9 N, the 110 f2,8 N, the 120 A Macro, the 150mm f2,8 A, the 200mm f2,8 A, the 300mm f5,6 ULD N, non exhaustive list.
But what bought me to some of the Pentax 645 lenses is their higher resistance to flare and ghosting, the larger image circle and higher contrast. It's a partial answer related to the few lenses I use, and other's mileage may vary.
edit: I found this
older thread on Mamiya versus…
