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Dave, Although the Pentax 120mm 645 macro is superb, trying out some of the other Pentax medium format lenses isn't redundant in my opinion. When I tried various 645 focal length lenses on the D800e, I was surprised at their level of performance even over many of the excellent similar focal Nikon 35mm format lenses. I attributed some of the look and notable imagery to the fact that the D800e was using the sweet spot of many of these 645 format lenses. Of course it's on a lens by lens (case by case) basis.Thanks for your test results. Gave me the impetus to look into an adapter to use my Pentax 645 manual focus lenses, all with aperture rings, on my A7R. Many of these lenses are redundant to 35 mm format lenses I have, but the Pentax 645 120mm macro is a stellar lens compared to all formats I have.
Regards
Dave in NJ
Don, how do you control the aperture? Does the adapter have enough electronic contacts to allow stop down metering?
So far all the legacy lenses I've used on the a7r have aperture control rings on the lens. Phase/Mamiya lenses are controlled from the camera.
???
Bill
Cut the damn foot off Don. LOL