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m39 to m42 adaptor

 
 
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Judas86




Joined: 15 Sep 2009
Posts: 27

PostPosted: Mon Feb 08, 2010 2:17 pm    Post subject: m39 to m42 adaptor Reply with quote

hi... i just recently purchased a jupiter 8 with a m39 to m42 adaptor... after that wanted to try mounting it on my 400D with am m42 to eos adaptor but i found out that the focusing is totally off... any suggestions on how to make the jupiter 8 to work on my 400D other than getting the m39 - eos adaptor...
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no-X



Level 3

Joined: 19 Jul 2008
Posts: 2360
Location: Budejky, Czech Republic

PostPosted: Mon Feb 08, 2010 2:22 pm    Post subject: Reply with quote

Jupiter-8 is rangefinder lens. It's designed for completely different register distance. It can be used as a close-up or macro lens on DSLR, but there's no way to use it as standard lens on DSLR camera.
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selling: Zeiss Triotar 135/4 M42, Tair 11A 135/2.8 M42, CZJ Flektogon MC 20/2.8 M42, MIR 20M MC 20/3.5 M42, CZJ Triotar T 135/4 exa+praktina
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Judas86




Joined: 15 Sep 2009
Posts: 27

PostPosted: Mon Feb 08, 2010 2:51 pm    Post subject: Reply with quote

ah ok... thats kinda sad... even with a m39 adaptor it wont work as well i guess?
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no-X



Level 3

Joined: 19 Jul 2008
Posts: 2360
Location: Budejky, Czech Republic

PostPosted: Mon Feb 08, 2010 3:32 pm    Post subject: Reply with quote

Adapter won't change anything; this lens wasn't designed for DSLR camera, but for view-finder/range-finder cameras. Standard focusing range can be reached on micro-4/3 cameras like Panasonic G1, GH1, GF1 and Olympus E-P1, E-P2 or E-PL1. Also Samsung NX10 could accept it.

But you can always use it as close-up lens. Jupiter-3 a nd Jupiter-8 have nice bokeh Smile
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(almost) complete list of Helios lenses

selling: Zeiss Triotar 135/4 M42, Tair 11A 135/2.8 M42, CZJ Flektogon MC 20/2.8 M42, MIR 20M MC 20/3.5 M42, CZJ Triotar T 135/4 exa+praktina
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Judas86




Joined: 15 Sep 2009
Posts: 27

PostPosted: Mon Feb 08, 2010 3:47 pm    Post subject: Reply with quote

alright... thanks a lot... Smile
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kds315*



Level 4

Joined: 12 Mar 2008
Posts: 3521
Location: Weinheim/Germany

PostPosted: Mon Feb 08, 2010 5:07 pm    Post subject: Reply with quote

Well, this is why we have a sticky here about lens/camera register length. It is always good to check that first.

It will work in principle if the lens register is greater or equal camera register
(more precise, if it leaves at least 1-2mm space for an adaptor)

http://www.graphics.cornell.edu/~westin/misc/mounts-by-register.html
http://www.graphics.cornell.edu/~westin/misc/mounts-alphabetical.html
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http://www.macrolenses.de for macro and special lens info
http://www.pbase.com/kds315/uv_photos for UV Images and lens/filter info
http://photographyoftheinvisibleworld.blogspot.com/ my UV diary


Currently most FAV lens(es):

Zeiss UV-Planar f4/60mm
Nikon UV Nikkor f4.5/105mm
Rodenstock UV-Rodagon f5.6/60mm
Voigtländer (Cosina) Apo-Macro-Lanthar f2.5 125mm SL
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