Zeiss Biotessar 13.5 cm 2.8 ??? m42 rare

crist

crist

Crist
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Hi, I found this lens and I can`t find any info about it
can you help me?? is in m42 mount and dont have focus ring, maybe for macro shot, it`s came with Macro Extension Bellows .
Thanks
 
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Please provide the entire serial number and whether or not it is coated and marked with a red "T" or the like. The Biotessar is described in some detail in THE LENS COLLECTORS' VADE MECUM, a CD in PDF available for a donation to a charity of your choice from a number of sources. I can probably provide a copy to those interested in acquiring this necessary work.
 
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Allow me to retract my earlier comments. This lens does not seem to bear any similarity to what CZJ was making in 1930, the date consistent with its serial number. CZJ truncated its serial numbers when they got to ten million, and the pattern thereafter is rather difficult to comprehend, so this may well be a post-1980 lens. I can find no evidence in II Thiele in either of the relevant sections that CZJ produced a Biotessar after 1930, but this lens is clearly so marked. When the Zeiss Lens List of the late Charlie Barringer becomes available again, it might have some helpful suggestions: Thiele works from the factory recors, and Charlie was an "industrial archaeologist" and worked from field data.

In the meantime, I will ask about this on the Zeiss Ikon Collectors' Group and on the Praktica Users' Group discussion lists. We do have some mighty smart folks over there!

Marc
 
Crist
I have discussed this lens with Klaus Schmidt, with whom you earlier had discussed it. I am beginning to think it is a fake. There are just too many things which do not add up, and the serial number is a high-definitionn red flag.

Marc
 
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