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Biogon 25mm Framelines/coding


usm

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Mario,

I seem to recall that Zeiss originally made them with 28/90 bayonet, but changed it to 35/135 after the launch of the M8 so the answer to your question is that it can be either. You can buy a replacement bayonet from Zeiss. If you want to code the lens as a leica 24, you'll need the correct bayonet for the code to be recognized.

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Adding to the above, Zeiss, in the states would not sell me a new m-mount for any ZM lens.

 

 

That is amazing and I would deal with Germany is I were you. There is no problem with the mother company sending you the parts. Or you could send Zeiss USA copies of the relevant parts from this thread:

 

http://www.l-camera-forum.com/leica-forum/leica-m8-forum/20663-zeica-21-2-8-a.html

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80 euros to have parts installed and lens checked including shipping in 2008.

 

Here is the contact info.

 

 

Carl Zeiss AG

Geschäftsbereich Photoobjektive / Camera Lens Division

Internationaler Vertrieb / International Sales

Kundensupport / Customer Support

 

Telefon/Phone: ++49 7364 20 3398

Fax: +49 73 64 20- 40 45

e-mail: hoenlinger@zeiss.de

http: Willkommen bei Photoobjektiven von Carl Zeiss

 

Carl Zeiss AG, Carl-Zeiss-Straße 22, 73447 Oberkochen

Vorsitzender des Aufsichtsrates:Tilman Todenhöfer

Vorstand: Dr. Dieter Kurz (Vorsitzender)

Dr. Hermann Gerlinger, Dr. Michael Kaschke

Sitz der Gesellschaft: 73446 Oberkochen, Deutschland

Amtsgericht Ulm, HRB 501555, USt-IdNr: DE 811 119 940

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If your 25 Biogon has the 28/90 flange, it can be machined down to become a 24/35 flange. I had this done by DAG on my lens when I sent it to him for coding. This way you don't need to worry about flange screw positions. Except that one of the screws is positioned at an end coding dot; fortunately that dot should be white, and the bright screw head substitutes well, so my coding works well: 011001 as a 24mm Elmarit ASPH

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Adding to the above, I think if you want the new screw positions you need to get a new Zeiss lens. I doubt a new type flange would be applicable to an old-type lens. The issue then is to deal with the screw positions as they are on the older lens you have.

 

Not a problem... I mentioned what happens when the screw head overlaps the location of an end white dot. I also have some ZM lenses where a dollop of black nail polish darkens the appropriate part of the screw head and is successfully read by the camera as a black coding dot.

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