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Gurdie
Joined: 29 Jul 2008
Posts: 997
Location: Finland
Expire: 2013-02-20
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 Posted: Wed Jul 17, 2013 5:05 pm Post subject: Schneider-Kreuznach Cinelux-Ultra 75 mm f/2 projection lens |
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Gurdie wrote:
On a whim I bought a cheap S-K Cinelux-Ultra 75 mm f/2 lens without knowing how to use it. I knew it was for 35 mm projectors, so I thought, that infinity might be possible even with my Nikon body.
New Schneider-Kreuznach lenses are expensive so I thought that this probably isn´t any cheap plastic lens.
Cinelux-Ultra- lenses are 6-element double Gauss lens designs.
The lens is without iris or any means of focusing. I tried to mount it with a Nikon K2 extension ring (5,0 mm), but it focused past infinity. With K2 and 10 mm K4 rings, a 52 to 58 mm step-up ring it focuses to about 2 metres.
It seems that the lens-to-film-plane distance is about 57- 59 mm, because at least 11-12 mm extension is needed to get infinity. I have to find out a means to build a focusing slide tube or something.
The lens mount on my D700.
Samples, no PP, just converted to JPG and resized.
Not much CA to be seen.
100 % crop.
With PK-13 (27,5 mm) extension ring. Focuses to about 40 cm.
Maybe I should test it as a portrait lens.
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Markku
Give me two hours a day of activity, and I'll take the other twenty-two in dreams.
― Salvador Dali
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pavko
Joined: 31 Jan 2011
Posts: 216
Location: PL
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| Posted: Wed Jul 17, 2013 10:33 pm Post subject: |
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pavko wrote:
Very nice rendering - should be good portrait lens. BTW. It looks cool also  |
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Wed Jul 17, 2013 10:46 pm Post subject: |
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Attila wrote:
I like it much, thank you for sharing it, congrats!
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ZoneV
Joined: 09 Nov 2009
Posts: 1632
Location: Germany
Expire: 2011-12-02
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| Posted: Wed Jul 17, 2013 10:51 pm Post subject: |
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ZoneV wrote:
A Macro Teleconverter (not Panagor) could probably work. I use these for my tinkering as focusing helicoid.
I have some Isco/Schneider projection lenses, but not all modified up to now.
A smaller Som Berthitoh lens work well with such a macro teleconverter.
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Gurdie
Joined: 29 Jul 2008
Posts: 997
Location: Finland
Expire: 2013-02-20
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| Posted: Thu Jul 18, 2013 7:56 am Post subject: |
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Gurdie wrote:
| ZoneV wrote: |
A Macro Teleconverter (not Panagor) could probably work. I use these for my tinkering as focusing helicoid.
I have some Isco/Schneider projection lenses, but not all modified up to now.
A smaller Som Berthitoh lens work well with such a macro teleconverter. |
Thank You Markus, I´ll also check how thin focusing helicoids are available.
_________________
Markku
Give me two hours a day of activity, and I'll take the other twenty-two in dreams.
― Salvador Dali
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Yahvel
Joined: 12 Oct 2012
Posts: 243
Location: USA
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| Posted: Mon Jul 29, 2013 4:55 pm Post subject: |
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Yahvel wrote:
wow, i never seen something like this before. |
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philslizzy
Joined: 07 Aug 2012
Posts: 4744
Location: Cheshire, England
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| Posted: Mon Jul 29, 2013 10:45 pm Post subject: |
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philslizzy wrote:
Lovely rendering, I was thinking it would be great for portraits, but someone already mentioned that.
You could use the helical from an old lens, I have a broken helios with the optical block removed. I glued an M42 female ring inside and now I make a lens mount with an M42 end to screw it onto the helical and it focuses just fine on my Nikon with an M42 adapter. I have adapted 3 lenses and they all use the same helical.
I use M42 as the screws are easy to obtain (teleconverters, extension tubes, t-mounts, broken Zenits etc.
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