Rodenstock Heligon 1,5/100mm question

does anyone know wheather this is a fixed-focus / fixed-aperture lens ?

http://cgi.ebay.ch …1b25&_trksid=p3​286.c0.m14

thanks in advance for your help, regards...

Yes, this is a fixed focus lens. Focus is achieved by moving the camera or by adding bellows/helicoid. As best I can tell, none of the Rodenstock-Heligon lenses have an aperature. Consequently, all must be used wide open. Exposure is controlled by shutterspeed.

It looks like an interesting lens. I investigated Rodenstock lenses a couple of months ago. They are mostly very fast, but will take some modification to work with EOS cameras. This individual has already made the modifications.

Yes,fixed focus and probably at about 1.5' if you mount it on your Canon. I have a Rodenstock Heligon 80/2.8 which has aperture blades in it. Mounted it on a Kilfit Zoomar focusing helicoil and now I can use it on my Canons. Wonderful lens.

Gene, as always you're a great source of information. I can't figure out the base of the Rodenstocks. Are they m39? That's the problem I ran into a couple of months back as I found a couple at reasonable prices and in good shape but couldn't figure out how to mount...

Yes, many Rodenstocks are m39, easy to get an adpter and make it m42. Measure it with a ruler - or ask the seller to.

I've actually got an extra m39 to m42 adapter in the drawer... This is probably something I didn't need to know...

Do you have a Jupiter 9 (85/2) in chrome, M39 mount? I like it so much I have an extra copy.

You and I talked about the Jupiter a while back. I have a silver Helios... I've also got a Nikkor 85/1.8 "H", Tak 85/1.8, Pentax 85/2.2, Viv Series 1 90/2.5, and EF 85/1.8. Please don't talk me into another!

I find I reach for the Tak in most cases. Helios if I'm after the weird bokeh, Pentax for its soft focus look. I really haven't shot the Nikkor much, but I understand it's wonderful.

I'm not a Pentax fan. Don't like the bokeh in general. Just sold my Helios 40-2.

Why do you prefer the Jupiter to the Helios? Size and weight are obvious advantages, resistance to flare (at least compared to my version) is another. What other benefits do you see with the Jupiter?