[LargeFormat] Double Protar Lens

[LNphoto]

>
> Les,
>
> That's a great solution. The C set lenses are probably a lot lighter 
> than the Series VII though. If I come across a cheap Zeiss C set in 
> the box with the hen's teeth then there is an old alphax shutter 
> sitting here waiting :-)
>
> Have to ask - can you still buy chewing tobacco?
>
> Cheers,
>        Clive
>
>
  My C set is a series VII also, While you could buy your single 
elements one at a time, you could also buy them all at once, with a 
little advantage of a single case....

Zeiss and B&L sold a series of three or 4 single elements as a Lettered 
Set.  Series C covered 5x7,  Series d coverd 6x8 and some 8x10, And 
series F covered 8x10   all of these are Series VII protars, but as you 
might surmise the barrel diameter of the F set is a lot larger than the 
series C. I call mine a C+ set as it also has a 5x7 ex wide Series V 
protar with a flange adapter so it doesn't need a second board--my only 
trouble is my Kodak 2D is a hair's breath shy of making infinity with 
the Protar V.  So its for interiors only.

B&Ls C set was 8 3/4, 11 3/16, and 13 3/4.  Combined to make 5  5/8, 6 
1/8, and 7

B&Ls D set  was 11 3/16, 13 3/4, 16 1/8, 18 7/8  combined they make 7, 
7 1/2, 8, 8 1/2, 9 1/8, 10.

Notice that the sets over lap with two cells.    The glass will be 
identical, but the mount they are in will not.  With the C set the 11 
and 13 will be in the smallest barrel diameter possible.  With the D 
set they will be in the same barrel size as the much larger 18 7/8"

My Zeiss C set is 22cm  28cm and 35cm  or 9 3/4 12 7/16, 15 9/16.  
Richard is right, they are notably different in focal lenght.