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Sami Loukiainen
Joined: 21 Jan 2011
Posts: 7
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 Posted: Fri Jan 21, 2011 6:43 am Post subject: Adapter for biotar 80mm 2.8 pentacon to EOS |
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Sami Loukiainen wrote:
Hi!
I Recently got biotar 80mm lens and it has a adpter, but it dosen't focus to infinty. I'm thinking of buying new adapter to fix this problem, but read somewhere that not all of the adapters won't focus to infinty, although they promise to.
So, is this true?
I´m using 5d MKii |
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my_photography
Joined: 03 Nov 2008
Posts: 2772
Location: Pearl of the Orient
Expire: 2016-12-25
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| Posted: Fri Jan 21, 2011 7:11 am Post subject: |
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my_photography wrote:
Welcome Sami.
Yes, not all adapters are made the same, thickness-wise. For some lens that small variance might be more critical as compared to other. Sometime it might not be the adapter which is in fault since it could even be originally, the lens could not be able to focus to infinity in its original system.
In the case of a 80mm lens, infinity might not be as critical as it is more a portrait lens, I think. I am sure other will comment more.
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Zeiss: CJZ Flektogon 20/2.8, CJZ Flektogon 20/4, , CJZ Pentacon 29/2.8, CJZ Flektogon 35/2.4, CJZ Pancolar 50/1.8, Tessar 50/2.8, Biotar 7.5cm/1.5, CJZ Pancolar 80/1.8, CJZ Sonnar 135/3.5, CJZ Pentacon 135/2.8 CJZ Sonnar 200/2.8
Other Germany: Meyer Primoplan 50/1.8, Meyer Trioplan 100/2.8
Takumar: SMC 50/1.4 Super Tak 55/2, Super Tak 85/1.9, S-M-C 135/3.5, Super Tak 150/4
Russian: Zenith 16/2.8, Mir-24M 2/35, Volna-9 50/2.8, Helios 44M (58/2), Helios 44M-3 MC (58/2), Helios 40 (85/1.5), Tair 11A (135/2.8 )
Others: Sears 28/2.8, Sankor 35/2.8, Enna M�nchen Tele-Ennalyt 135/3.5
Zoom Sigma Zoom 28-85/3.5-4.5
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Sami Loukiainen
Joined: 21 Jan 2011
Posts: 7
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| Posted: Fri Jan 21, 2011 7:21 am Post subject: |
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Sami Loukiainen wrote:
Wow, that was fast reply! Thanks, BTW, great site, and forum.
For portrays I bought it, so it is not that big problem, but it would be nice to have possibilty to focus it to infinty, never know, when its going to be needed...
But right now going to by new focus screen
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Gonzoo
Joined: 29 Mar 2010
Posts: 231
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| Posted: Fri Jan 21, 2011 3:30 pm Post subject: |
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Gonzoo wrote:
According to pentaconsix.com the register distance should be 74.90mm
You can measure your adaptor if it provides the correct distance from lens to film/sensor plane. If it is too short, just try another one. I've got two no-name adaptors, both working fine.
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Canon 5d | Exa 500 | Pentacon Six + too much lenses  |
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LucisPictor
Joined: 26 Feb 2007
Posts: 17633
Location: Oberhessen, Germany / Maidstone ('95-'96)
Expire: 2013-12-03
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| Posted: Fri Jan 21, 2011 4:10 pm Post subject: |
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LucisPictor wrote:
I used to have a very good one but sold it and I still have a P6-M42-adapter which works perfectly with an additional M42-EOS- or M42-SA-adapter.
You can find good ones. Keep on looking for them...
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Sami Loukiainen
Joined: 21 Jan 2011
Posts: 7
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| Posted: Fri Jan 21, 2011 4:18 pm Post subject: |
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Sami Loukiainen wrote:
If I measured it from right places, then current adapter gives only about 63mm.
Do you, Gonzoo, recall, where did you get your adapters? As I live in Finland, the only way for me to get those adapters is to order somewhere without possiblilty to try it first. |
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Gonzoo
Joined: 29 Mar 2010
Posts: 231
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| Posted: Mon Jan 24, 2011 2:54 pm Post subject: |
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Gonzoo wrote:
Unfortunately not. I got mine (P6-Eos, P6-M42) when I bought a Sonnar 180... wait I think I've got a spare P6-M42. I'll check tonight and pm you afterwards.
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Canon 5d | Exa 500 | Pentacon Six + too much lenses |
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