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Jon K
Joined: 07 Oct 2011
Posts: 10
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 Posted: Sat Oct 08, 2011 2:32 am Post subject: Carl Zeiss Jena Tessar 2.8/50 - a whole lotta aperture blade |
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Jon K wrote:
Hi all -
Another lens I recently grabbed off ebay is t he CZJ Tessar 2.8/50
Performs very well it seems (for what it is!). Its very small and light. Being a 2.8 its not very fast for a 50mm prime.
The coolest thing I've noticed though is that the aperture control is smooth (no notchy/clicky spots, totally smooth like the focus ring) and there are a TON of aperture blades! I believe I am counting 14 blades. It looks like the aperture is totally round at all f-stops which is very nice!
IMG_7902.jpg by Jon Kensy, on Flickr
IMG_7904.jpg by Jon Kensy, on Flickr
How rare are these things? I see mention of the 2.8/50 a lot but not the 14 blade variant. |
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mmelvis
Joined: 24 May 2010
Posts: 1326
Location: Florida,USA
Expire: 2015-05-09
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| Posted: Sat Oct 08, 2011 10:32 pm Post subject: |
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mmelvis wrote:
My 2.8 50mm came attached to a Pentacon ZI camera. The lens has 14 blades like yours so I am not sure how rare this lens is. |
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hasan
Joined: 12 Mar 2007
Posts: 313
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| Posted: Sat Oct 08, 2011 11:16 pm Post subject: |
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hasan wrote:
look at that link in my last post here, please:
http://forum.mflenses.com/carl-zeiss-tessar-50mm-f-3-5-alu-m42-t31980.html |
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Sat Oct 08, 2011 11:16 pm Post subject: |
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Attila wrote:
Cute and good lens ! Congrats! I look forward samples taken with this lens!
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Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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Mos6502
Joined: 20 Jun 2011
Posts: 960
Location: Austin
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| Posted: Sun Oct 09, 2011 12:56 am Post subject: |
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Mos6502 wrote:
It's a pretty common lens. Lots and lots were sent out on early Prakticas. There's an Exakta mount version too. |
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Jon K
Joined: 07 Oct 2011
Posts: 10
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| Posted: Sun Oct 09, 2011 2:39 am Post subject: |
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Jon K wrote:
Thanks for info guys. The only issue I have right now is that it won't focus to infinity because the zeiss has a small beveled rear surround that bottoms out against my M42 adapter. I am thinking I need an adapter without a flange inside the threading.
How old is this thing? |
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Mos6502
Joined: 20 Jun 2011
Posts: 960
Location: Austin
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| Posted: Sun Oct 09, 2011 5:39 am Post subject: |
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Mos6502 wrote:
| Jon K wrote: |
Thanks for info guys. The only issue I have right now is that it won't focus to infinity because the zeiss has a small beveled rear surround that bottoms out against my M42 adapter. I am thinking I need an adapter without a flange inside the threading.
How old is this thing? |
Early to mid 1950s probably. I think Praktica adopted the auto-aperture in either 1956 or 1958, but I don't know how long after that Zeiss continued to make lenses like this. That gaurd on the back will also foul auto aperture plungers, so it's best not to put it on M42 cameras either (except of course early ones that don't have a plunger). |
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