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Thread: What is a Rodenstock TV-Heligon....

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    Senior Member apicius9's Avatar
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    What is a Rodenstock TV-Heligon....

    ... and can I use it on a G1?

    I had auctioned a pack of 'c-mount TV lenses' at this auction in Oregon a few weeks back, and they came in today - only 2 of them turned out to be c-mounts and one of them in useless shape. The others are all very strange, and the ones catching my attention were two Rodenstocks. I will post pictures later when I get home, but one of them is the same as this one here, only in better shape:

    http://cgi.ebay.com/RODENSTOCK-TV-HE...%3A1|294%3A200


    The second one is a very nice and heavy looking 64/0.95. Both have fixed focus and fixed aperture and seem to have different mounts that I don't know. As I said, I'll post pictures in case anybody knows more about the mounts but thought I'd start asking to see if anybody knows anything about them.

    Thanks,

    Stefan

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    Re: What is a Rodenstock TV-Heligon....

    Two words I have to describe them- Utter Crap.

    (I have a few and have shot with them on film and DSLRs)

    They are usually >1 kg in weight, fixed focus, fixed aperture (no diaphram) and have tons of many aberrations. To make it more useless the back focus at infinity is only a few mm.

    They were made as collimating lenses for X-Ray machines (they would record the green phosphor screens illuminated by X-ray) and directly focused on a tapered fiber glass end that sat on a sensor.

    Mount these on any 4/3rds or 4/3rds and you are in for a shock. These are the anti thesis of what a telecentric lens is.

    Have "fun"!

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    Senior Member apicius9's Avatar
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    Re: What is a Rodenstock TV-Heligon....

    Thanks for the info Vivek, that almost sounds like you have an opinion on them I found a few things through google about them, and they really seem to be of 'limited use', to say it conservatively... This post here shows a few pics, almost a bit artsy:

    http://forums.dpreview.com/forums/re...k+heligon&qf=m

    For mounting, the gentleman just glued on an Nikon adapter - that is about the amount of work and money I would be willing to invest to play around with it, but I don't have a Nikon to m4/3 adapter and so it sounds like it may not be worth it if I have to get that one first. I have all other lens formats I need covered and for these 'special' pictures alone I wouldn't want to spend too much. Unless someone has other ideas or experiences?

    - Here is another collection of pictures I found, taken with the 50/0.75, same concept I guess.

    http://www.aletan.com/p972322920


    Oh, and heavy they are! The 64mm one has a diameter of an estimated 70mm and should weigh close to a kg.

    Stefan
    Last edited by apicius9; 12th May 2009 at 16:19.

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    Re: What is a Rodenstock TV-Heligon....

    Stefan, Just hold them in front of your G1 and make a few snaps. If you are not satisfied, sell them off (unless you are like me- an accumulator)!

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    Re: What is a Rodenstock TV-Heligon....

    I also have a similar lens which is Kowa 50mm f1 which is almost the same character as Rodenstock. I apeture the iris can be adjust of sticking a small piece of paper with hole.

    The aperture is large to keep the image sharp. 1/3 small in diameter may help.

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    Senior Member apicius9's Avatar
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    Re: What is a Rodenstock TV-Heligon....

    Interesting, think I have to play more with them. Just checked the 42/0.75 but it really needs a good cleaning first, as it is I can't say what is a smudge and what is an effect...

    This pic is just a piece of Hawaiian koa wood taken with the 64/0.95 lens on a wooden cutting board. I like the way the colors came out (jpg, straight from the camera) but this is free hand and if I want any chance on getting anything sharp I have to get out the tripod. Mmmhh, maybe I do need one of these rail thingies after all

    More experiments this weekend, I hope.

    Stefan

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    Re: What is a Rodenstock TV-Heligon....

    Gives and interesting effect... I kind of like it! If your looking for that soft mysterious feel this lens definitely does the trick.

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