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Steve Spencer wrote:
I think it will be a very nice lens. It has a fluorite element and is reputed to be excellent. I am not sure yet whether i will convert it or just use it with the GH2 that I plan to get.
If your 400mm is the MC version, just use a Rollei to Eos adapter. On mine I get infinity focus, or close enough to make no difference. On the MD version, the MD lug may jam the adapter. Machining the adapter a little should remedy that.
Steve Spencer wrote:
Thanks for the tip. Mine is the MC version. So to covert it you simply use a Rollei to EOS adapter, drill new holes, and attach the adapter with the old screws? Anything else I should know? Any issues with aperture levers, etc.? I did convert my 58 f/1.2 myself, so I can do this sort of work, but that is the only lens I have converted.
No, it's much easier. The Rollei-EF adapter acts like a Minolta SR (MC) mount adapter. No conversion, no holes to drill, nothing like that. The only major problem is the thickness of the adapter - for a perfect Minolta SR to EF adapter its thickness should be -0.5 mm, this one is 1.9mm. So, it acts like a 2.4mm extension tube. The effect of that depends on the focal length of the lens, the wider the angle, the more pronounced will be the effect. It will turn your 24mm into a very close-up lens only. But the 400mm is designed to focus slightly beyond infinity and 2.4mm extension is close to negligible on a 400mm anyway, so I get to focus to about 100 meters, so unless you're into astrophotography it is not likely to be a great problem.
Minor problems of this adapter may be the fractionally wider diameter of the Rollei mount compared to the SR mount. Depending on the adapter itself, you may get a fraction of a mm perpendicular play between lens and adapter. Also, the locking mechanism of the Rollei adapter does lock the Minolta lens, but maybe not as securely as it would with a Rollei lens. Bending the springy catch slightly locks the lens a lot better. Using a tiny bit of Teflon tape will get you a rock solid connection between lens and adapter