I find it increasingly difficult, telling these two apart.

I didn't have any issue retaining aperture function on my MC Rokkor 85/1.7. I simply removed the old mount, installed a spring for the aperture function and installed an m42-EOS adapter a la Rokkor 58/1.2 conversion method.

It's a nice lens, and renders very much like the 58/1.2, but with even smoother wide-open bokeh.

Nice work! That is a cool lens, worth picking one up I think.

The drawing style of the 58 1.2 is so sublime. I just got back some rolls of Ektar 25 I shot with it. Uber-smooth rendition, color, bokeh, etc. and so sharp!

-Ed

This lens absoulty rocks. Paul is correct, you can ditch the org mount and replace it along with a spring for the aperture. Some have used rubber bands, but bands break, or least the ones I was using. I still have not got a spring in mine, in a pinch I used one of my wifes small hair bands.

I like this lens so much, I even sold my 85 planar.

Would you mind going over in a little more detail how you used an EOS flange to do the conversion? How did you slip it over the minolta flange? I'd like a cleaner/easier way to convert than drilling an M42 and sanding down the spacer. Edit: just saw your ebay listing for one of these, Jim. Looks like you just drilled/tapped the EOS flange for three setscrews and it slips right over. Correct?

Also, what are you guys talking about with the aperture and springs? I just finished a 58/1.4 conversion (Just working on sanding to get infinity focus) and I didn't have to do anything to get the aperture to work correctly. I did, however, have to file down the threads in a section of the m42 adapter, as a pin inside the lens was hitting it while focusing at certain apertures.

You need to stop telling people how great these lenses are before I have a chance to pick one up. I've been stalking them on feebay for weeks!

Sounds like you figured the 58/1.4 aperture situation out. The pin just hits the M42 threads slightly. Grinding out the threads is the solution.

Basically, yes, I reused the minolta stock flange on the MD85/1.7, as I do on all Rokkor lenses of this construction, for the strength and axial alignment it provides. This method allows the stock aperture mechanism to remain original and operable. The original Rokkor flange is turned into a spindle or cylinder, and the EOS adapter is made to fit over it very snuggly. The setscrews do not pin the EOS flange on, but are threaded all the way through all walls to provide the strength a pin would.

Booone0 wrote:
Would you mind going over in a little more detail how you used an EOS flange to do the conversion? How did you slip it over the minolta flange? I'd like a cleaner/easier way to convert than drilling an M42 and sanding down the spacer. Edit: just saw your ebay listing for one of these, Jim. Looks like you just drilled/tapped the EOS flange for three setscrews and it slips right over. Correct?

Also, what are you guys talking about with the aperture and springs? I just finished a 58/1.4 conversion (Just working on sanding to get infinity focus) and I didn't have to do anything to get the aperture to work correctly. I did, however, have to file down the threads in a section of the m42 adapter, as a pin inside the lens was hitting it while focusing at certain apertures.

Ed Sawyer wrote:
Nice work! That is a cool lens, worth picking one up I think.

The drawing style of the 58 1.2 is so sublime. I just got back some rolls of Ektar 25 I shot with it. Uber-smooth rendition, color, bokeh, etc. and so sharp!

-Ed

Hi Ed.
Is Kodak-re makinf ektar 25 ? iam confused?
Cheers
Harry

Kingfishphoto wrote:
Ed Sawyer wrote:
Nice work! That is a cool lens, worth picking one up I think.

The drawing style of the 58 1.2 is so sublime. I just got back some rolls of Ektar 25 I shot with it. Uber-smooth rendition, color, bokeh, etc. and so sharp!

-Ed

Hi Ed.
Is Kodak-re makinf ektar 25 ? iam confused?
Cheers
Harry

Nope, Ektar 25 is still dead, but you can find outdated rolls on ebay and since it's so slow the rolls haven't degraded much.

Kodak did just introduce a new Ektar though, Ektar 100.

Thanks.
However i never thought 100 equalled 25, however new tech. will probably prove me wrong.
Thanks
Harry

hi Harry -
Mawz is right, I am using old Ektar/RG 25. I have a few bricks of it, it's not aged in a bad way at all, a little slow (rate at 15-20asa) but otherwise as good as ever! I havent' tried the new Ektar 100 yet but will soon.

-Ed