Protar VII filter size
 

"Cheesehead" wrote in message
...
I'm looking but cannot find the info, at least not yet.
Is it a modern metric or one of the Series 'n' type that
was common in
the era.
I'm not sure all Convertible Protar cells were the same
size and it might also depend on if its a Zeiss or Bausch &
Lomb lens. There are some old catalogues at
http://www.cameraeccentric.com for both companies which
might have dimentions. The filters used at the time were
mostly held in a push on adaptor of some sort or a
combination lens shade and filter holder that took large
square glass filters. "Series" size push-on adaptors still
show up but have become hard to find and you have to find
the right size. You may have to make one; they are not hard
to make from cardboard.


--
--
Richard Knoppow
Los Angeles, CA, USA