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Frogfish
Joined: 06 Apr 2010
Posts: 57
Location: Shanghai
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 Posted: Wed May 18, 2011 9:04 pm Post subject: L39 to PK |
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Frogfish wrote:
Is there any way I can convert a Voigtlander 15mm Heliar in L39 mount to a PK mount and retain infinity ?
Thanks !
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Nikon D800E, D600, Zeiss Distagon 21/2.8, Zeiss Distagon 35/2, Nikon 300/2.8 VRII, Sigma 500/4.5 (for sale), Sigma 120-300/2.8, Nikon 85/1.8G, Sigma 50/1.4, Nikon TC20EIII, Nikon TC14EII, Sigma DG x2.0 |
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luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Wed May 18, 2011 10:36 pm Post subject: |
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luisalegria wrote:
I don't think so. The lens would end up hitting the mirror whatever you do. The difference in the backfocus is almost 16mm
This is a perfect lens for a Nex I would think. APS-C sensor and no mirror, there are Leica-M39 adapters that give infinity.
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I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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RioRico
Joined: 12 Mar 2010
Posts: 1120
Location: California or Guatemala or somewhere
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| Posted: Thu May 19, 2011 3:15 am Post subject: |
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RioRico wrote:
Luis is correct, BUT... I can think of one possible adaptation. Alas, the results may not be acceptable.
You MIGHT be able to use a chopped-down M42 teleconverter -- but then the lens would no longer be 15mm. I will admit that I haven't tried this with any L39 lens, and I won't be able to test this for several more weeks (I'm on an extended journey). The idea occurred to me just now. I may be totally wrong, this may not be feasible at all. But I seriously doubt that anything but an optical adapter would work. And the results may be lousy. Sorry. 
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Too many film+digi cams+lenses, oh my -- Pentax K20D, K-1000, M42s, more
The simple truth is this: There are no neutral photographs. --F-Stop Fitzgerald |
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Frogfish
Joined: 06 Apr 2010
Posts: 57
Location: Shanghai
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| Posted: Thu May 19, 2011 4:15 am Post subject: |
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Frogfish wrote:
Thanks guys.
The reason I thought this was feasible is that I've just bought a Voigtlander Colour Ultron 50/1.8 that has been fitted with a PK mount and focuses to infinity.
In fact I love this lense already so would really like an UWA Voigtlander too and from the reviews I've read the 15mm seems to have a much better reputation than the 12mm .... and is a great alternative to the Pentax 15mm.
Not sure how that was done though as I thought the registration distance was an issue.
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Nikon D800E, D600, Zeiss Distagon 21/2.8, Zeiss Distagon 35/2, Nikon 300/2.8 VRII, Sigma 500/4.5 (for sale), Sigma 120-300/2.8, Nikon 85/1.8G, Sigma 50/1.4, Nikon TC20EIII, Nikon TC14EII, Sigma DG x2.0 |
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luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Thu May 19, 2011 4:17 am Post subject: |
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luisalegria wrote:
There are M39-PK adapters, I have one. There is no need to make a special mechanical adapter. If you can calculate and grind an adjustment lens besides, thats something else.
It lets you screw an M39 lens on a PK camera. But it does not solve the back focus problem, so you will certainly not get infinity with a Leica-mount lens; with a tele lens you will get some degree of close focus, with a 15mm it will be an extreme macro only.
This is a Leica mount Arco 135 on that adapter - excellent lens, but close focus only on PK -
http://forum.mflenses.com/arco-tele-colinar-3-8-135-leica-mount-t24184,highlight,%2Barco.html
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I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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