[LargeFormat] Double Protar Lens

[LNphoto]

the 16" Was part of the D set and in it's "normal" mount is probably 
the same as the 18" cell.   The pair of 11" lenses are probably in a 
smaller mount than the 16.

So the 11" cells are US system.  That's unusual, at least here in the 
States.   For the most part US system had been cast aside like a DAT 
tape or a laser disc by WWI.  Maybe it hung on later over there.

Les


On Thursday, September 4, 2003, at 03:39  PM, Clive Warren wrote:

>
> Les and Richard,
>
> I seem to have become the target of used Protar dealers ;-)
>
> There is now another set winging its way towards sunny Bristol from 
> the caves of Mordor in the North.  This time it is again a set of same 
> focal length cells, Bausch & Lomb - Zeiss Protar Series VII Focus 16 
> 1/8" both front and rear cells.
>
> From what you have said, it seems that one of these would have formed 
> part of a D set? Presumably in a larger diameter barrel than the C 
> set. Perhaps your catalog has the info. for the combined focal 
> length..... would be great if the combined lens covers 8x10 however I 
> have the feeling that you are going to tell me that the combined FL is 
> around 8".
>
> It seems almost certain that the previous lens is a pair of 11 3/16" 
> cells as you suggested. The stops are marked in the Unified System 
> which caused me some confusion initially f:16 = f/16 and work from 
> there......
>
> Cheers,
>        Clive
>
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