Biotessar 13.5cm 2.8 T M42!!! Rare?? info??

[cristian1971]

Hi, I found this lens in the flea market 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

[no-X]

Could you please post some pictures of the lens and some pictures taken by the lens?

[cristian1971]

How can i post pictures here??[/img]

[no-X]

you can use [upload picture] button, which you see when you are writting a message (upon the message window on the right)

[Seele]

It should be a modified old LF lens.

[Esox lucius]

[cristian1971]

[cristian1971]

[Attila]

Must be rare first one what I seen look macrolenses.de perhaps exist in Klaus's db.

[ManualFocus-G]

Some sort of medical lens perhaps? Interesting!

[F16SUNSHINE]

If you don't want it I'll buy it from you.
It's a LF lens and bit uncommon.
Here is a very recent thread with a couple samples.

http://forum.mflenses.com/meridian-field-camera-zeiss-biotessar-kodak-polycontrast-t28106.html

cheers
Andy

[cristian1971]

any offers?

[luisalegria]

Post-war coated version. Probably few made.

These were specialized "portrait" lenses, usually mounted like yours in barrel for large format reflex cameras, but some were mounted in shutter.

These were long-focus lenses with limited coverage, so yours was probably intended to cover 6x9cm, the equivalent of an 80mm in 35mm format.

[F16SUNSHINE]

I found this:

originally posted by Marc Small at LUG
 I dug through some of my archives last night to find out more about the lens
-- and here's the straight skinny:

        The Biotessar formula is a six-element, three-group, design derived
from the basic Tessar formula:  it has a doublet in front where the Tessar
has a singlet, and a triplet in the rear where the Tessar has a doublet.
The formula dates from the early 1920's and I could not find the name of the
designer.  Surprisingly, Kingslake makes no reference to this design.

        The standard Carl Zeiss Jena inter-War publication on their lenses,
_Zeiss Objectives:  The Eagle Eye of Your Camera_, states that

        [T]he Biotessar F/2.8 was constructed in response to 
        the repeated demands for a hand camera lens of very 
        great rapidity but of more universal application than 
        the f/2.7 Tessar.  Compared with the latter the F/2.8
Biotessar marks a considerable advance in the field of 
        very rapid yet universal objectives, for even at full 
        aperture it gives excellent definition over the whole 
        field, whilst when stopped down to F/3.5 and F/4.5
respectively, it is not inferior to the Tessars of 
        these maximum apertures.  The angle of firled for 
        which the F/2.8 Biotessar is recommended measures 
        fully 40 degrees.

        The Biotessar was available in either 13.5cm or 16.5cm focal lengths
and could be had mounted in a Compur or Compound shutter, in the focusing A
mount, the standard N mount, or the recessed B mount.  The diameter of the
outer lens ring was either 69mm or 70mm for the 16.5cm lens.  The 1938 and
1939 Carl Zeiss Jena American price lists no longer list either focal length
with an inbuilt shutter, but do list them with the other three mounts.  The
price of the 2.8/16.5 lens with the standard N mount was $154.00 in both
years.  By way of comparison, the 3.5/16.5 Tessar cost $100.00 and the
4.5/16.5 Tessar $49.00.  (This would be roughly 32 pounds sterling for the
Biotessar against 20 pounds for the f/3.5 Tessar and 10 pounds for the f/4.5
Tessar.)  I do not have any Leica prices from this era at hand, but I
suspect other Stalwart and Intrepid LUG-Nuts will be able to provide
comparison data for Leitz for this period.

        The lens in question is undoubtedly a large-format camera lens which
dates from either 1929 or 1930.  It is probably in a standard N mounting.
The adaptor for bellows usage is an after-market conversion of some sort:
this kind of skilled machining was not uncommon in the inter-War era when
craftsmanship was the rule and thus could be had at a relatively low cost.

        This is a fine lens of sound optical performance.  Its manufacture
preceded the development (by Zeiss, of course!) of lens coating in 1936, so
this will produce a softer optical effect.  It is both a curio of great
interest and a solid lens still capable of great usefulness some six decades
after its manufacture.

[cristian1971]

Ohh thanks,

[luisalegria]

This one though has the Zeiss red "T", so I would think its post-WWII ?

[exaklaus]

!930 made. Overall less than 400 were made of the 2,8/13,5cm. A rare beast that probably can bring some money if you don't want to use it yourself!!!

Klaus

[exaklaus]

[cristian1971]

Hi,
where do you found this information??

"930 made. Overall less than 400 were made of the 2,8/13,5cm. A rare beast that probably can bring some money if you don't want to use it yourself"

thanks

Crist

[exaklaus]

Thiele's Fabrikationsbuch Carl Zeiss Jena


Klaus

[kds315*]

http://www.lindemanns.de/shop/fotobuchhandlung/64015t-thiele-hartmut-fabrikationsbuch-photooptik-ii.php?sid=4be9086ff0bb5&iproj=limainst&direkt=10&ruck=/shop/fotobuchhandlung/uusuch4be9086ff0bb5.php&anker=ank11

[exaklaus]

Wow, you have the current version of the book. Only have the early one.

Klaus

[cristian1971]

Thank you so much for all your help

[cristian1971]

any offers? can i send the lens to worldwide by dhl or fedex with tracking, no p.o. box
I have 100% positive feedback on ebay user Cristian_villela

[cristian1971]

I sell this lens on ebay , thanks