[LargeFormat] Zeiss Barrel/Lens Info

[Peter Roody]

Hi,

I am posting a little late on an earlier thread because it lost it's 
direction.

I have some additional info on the Roman Numeral designations on Zeiss 
Barrels.  As was posted, this indicates barrel size (diameter).  The 
largest size is a XVIII (182 mm outside diameter). My 1910 catalog 
indicates 19 different diameters with 28 barrel sizes based on diameter 
and length.   When a subscript number appears, it indicates a different 
barrel length for the same diameter.  For instance, a IV with a 
subscript "1" is 33 mm long while a IV with a subscript "2" is 23 mm 
long.

I also own a Series VI triple convertible lens (310 mm/660 mm/f450 mm) 
so these were made.  The single lens consisted of 3 cemented elements 
at F14.  Combined, my lens has a maximum aperture of 9.4.  They were 
first issued in 1893 and the last manufacture date for the Series VI 
was 1894.  They were replaced with the Series VII that was introduced 
in 1895.

Hope this info is useful,

Pete