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Vladislav Kern Vlad
USA
4251 Posts My Collection
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Posted - Oct 23 2008 : 11:34:12 AM
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Excellent timing Mike in posting this "T" lens!
Just yesterday Steve (Bull Halsey) and I had a lenghty discussion about this "T" Jupiter-8 lens, I hope he will see this post and post his theory. Otherwise I'll do it if he does not respond. But it makes a lot of sense. |
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BERRY alain mermoz37
France
814 Posts |
Posted - Oct 23 2008 : 12:05:05 PM
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Hi friends, you remember we had a discuus in the past about "T" lenses ( I possess a Helios 40 "T" (but "T" is after name ...not after serial number) so we had no explanations except my Finish friend which tell me "T" is added on special lenses for Artic use (low temperatures use) who know the truth again ????? |
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Steve Bull Halsey
USA
229 Posts |
Posted - Oct 23 2008 : 12:53:06 PM
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Hello All, I own a '63 No-Name Contax fitted with a F1.5 Jena Sonnar. The lens coating is quite similar to the Jupiter T pictured. Im ny opinion, most, not all, but most Russian lenses which are coated do not show much color due to the coating, while many of the East German lenses show off a much stronger color hue due to the coating.
The other day while speaking with Vlad I mentioned that my 50mm 1.5 Jena Sonnar has a strong blue color from the coating and like most (if not all) coated Zeiss lenses, has a "T" designation imprinted in red along the rim of the lens along with the lens name, serial number, etc. Thr T was the designation that Zeiss gave to indicate a coated lens. Granted, the Jupiter pictured has the T attached to the serial number, but that could just be a choice of the manufacturer.
I was just wondering if by any chance there were optics supplied which could have been from another source other than the norm, or had been coated differently, or were coatings experimented with in small batches ?
The date of the Jupiter would coincide with the Jena lens manufacturing.
Just a thought.
Steve |
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Stephan Van den Zegel stephanvdz
Belgium
176 Posts |
Posted - Oct 27 2008 : 10:53:01 AM
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strange... coating marks are usually free standing (in the zeiss tradition) or related to the optical definition (50 f2 T) for instance), here we have a variation on the serial number ... which could mean that the variation is not optical but mecanical... how does the lens reacts ? any special effect on the picture ? The coating seems very blueish indeed...
and to what term a cyrilic T could lead... ?
For zeiss collectors there is the mistery of TF coating mark... but that's another story
Stephan |
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Zoom
596 Posts |
Posted - Oct 27 2008 : 6:38:52 PM
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quote: Originally posted by mermoz37
you remember we had a discuus in the past about "T" lenses ( I possess a Helios 40 "T" (but "T" is after name ...not after serial number) so we had no explanations except my Finish friend which tell me "T" is added on special lenses for Artic use (low temperatures use) who know the truth again ?????
See http://www.zenitcamera.com/qa/qa-indexes.html
Some examples: Helios-40-T -- for a television cameras. OF-28T -- the tropical version (named this way in a documentation, but on a body the letter "T" is always placed near the serial number).
So, as I think, this is the tropical version of Jupiter-8M (has another coatings and lubrication). Btw, the "arctic lenses" must have a heating... ;) |
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Stephan Van den Zegel stephanvdz
Belgium
176 Posts |
Posted - Oct 28 2008 : 4:21:10 PM
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how do your write tropical in russian ?
Stephan |
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Zoom
596 Posts |
Posted - Oct 28 2008 : 5:04:18 PM
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quote: Originally posted by stephanvdz
how do your write tropical in russian ?
tropical == òðîïè÷åñêèé (tropicheskiy) tropical version == òðîïè÷åñêîå èñïîëíåíèå (tropicheskoe ispolnenie)
Btw, this word is from Greek: τροπικος... ;) |
Edited by - Zoom on Oct 28 2008 5:38:14 PM |
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Mark Beadle Mark240590
United Kingdom
6 Posts |
Posted - May 04 2024 : 11:49:05 PM
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Hey. Seems like this one never really got any further eh ? Shame but I’m Now the new owner of this lens. It’s a great curio. Gunna try to shoot with it this weekend on digital and film :) |
Edited by - Mark240590 on May 05 2024 12:31:35 AM |
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sean perry seany65
United Kingdom
329 Posts |
Posted - May 12 2024 : 12:24:43 PM
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Mark, You do now realise that you're going to have to go to the Arctic AND the Tropics to take photos to test the lens properly, considering that it's not too clear whether the "T" is for Arctic use or Tropical use?
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Mark Beadle Mark240590
United Kingdom
6 Posts |
Posted - May 29 2024 : 3:49:35 PM
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Hahaha, well I guess I can live with that ! 🤣 |
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Andreas treehorn
Germany
17 Posts |
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sean perry seany65
United Kingdom
329 Posts |
Posted - Jun 05 2024 : 4:18:14 PM
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Thanks for the link Andreas. I wonder what the actual differences were between an "ordinary" lens and a "topographical" lens are?
Mark, you could always fly over the Tropics and the Arctic to take topographical photos, just so you can say you've done the full list of the things it was thought the lens was for until Andreas cleared things up for us. |
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Alexander K. AlexanderK
Germany
590 Posts |
Posted - Aug 31 2024 : 05:46:20 AM
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quote: Originally posted by seany65
... I wonder what the actual differences were between an "ordinary" lens and a "topographical" lens are? ...
The main difference is only "T" letter . So far as I know there was a special order for cameras for topographical service and this letter was engraved to separate this spacial batch for the topography from the normal serial cameras. May be there ware some improvements for "T"-lenses, but I have no further information about this.
Regards, Alexander |
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