Hi, is this lens any good based on people's experiences?
I've just started building a collection of alternative lenses and today bought a 58mm f1.2 MC Rokkor which is beautiful. Is the 45mm f2 Rokkor similar in IQ?
hi,
if you have a rollei EOS adapter, you can clamp it on the minolta mount
an test it until 3-4m without building anything.
My first view with it on my 5D was very promising.
but converting it will not be easy.
later this month i hopefully know more.
Sorry to bump an old thread, but is there any information on converting one of these to EOS? I recently acquired one for $20 and thought it'd be nice to use as a pancake on a 5D. I've heard rumors of something related to the Cogitech forum (which is down) and I can't find any information on how to do the conversion.
JimBuchanan described his approach once for me. It isn't easy and the lens probably doesn't have the IQ to make it worthwhile. The 45/2 I bought for $15Cdn is still a Minolta mount. If I happen across a MD>4/3 adapter some day that's cheap enough I may try it out on my friend's Oly.
Well, I really like my converted one .. I think it's a sleeper, especially so cheap. I think it is easier than the 50 1.4. Used a circular grinder, sanded down .5 mm. It's easy to sand since the MD mount is removable from the bottom base. I think you should try to convert it. Good luck.
One correction: now that I look at the conversion, it is the same difficulty as the rokkor 50 1.4. I had to grind both the mount base and the M42-EOS adapter and adjusted infinity focus from the front in the end.
I've completed another 45mm f2 conversion. This time I managed to record the process.
The process should be similar with many other rokkors (50 f1.4, 85 f2, 28 f2, ...) using simpler tools (I wish I had a lathe). I hope it will be helpful.
I really, really love this lens on my X700 so I think I'll keep it that way. Don't want to go cutting and gluing and messing around with a perfectly good lens. REALLY wanted this to use on my 5D, but I can't justify the trouble that it's most likely going to cause me.
Not to mention I don't have the tools to get it done properly.
debuggerus wrote:
I've completed another 45mm f2 conversion. This time I managed to record the process.
The process should be similar with many other rokkors (50 f1.4, 85 f2, 28 f2, ...) using simpler tools (I wish I had a lathe). I hope it will be helpful.
Debuggerus, thanks for the excellent pictorial guide.
One thing puzzles me, though: You remove the aperture mechanism, and never replace it? How does that work? Is that mechanism only there for when the (Minolta) camera does auto stop-down?
Also: Any mirror issues? (I use a 5D, so this is always a concern)
The aperture mechanism needs to be re-installed onto the back of the plate before assembly, or aperture control will be lost altogether. There should be no mirror issues to worry about.
