Re: New Resource for Wollensak Lenses and Shutters
That Wollensak Lenses and Shutter Resource has been great the last couple of weeks as I am trying to date a number of my vintage lenses.
I have three lenses in Betax No. 4 shutters. I know you list 1921 as the date Wollensak introduced the Betax shutter,
Any idea when Wollensak stopped manufacturing the Betax?
Thanks, Scott
Re: New Resource for Wollensak Lenses and Shutters
Hi Scott,
Based on the available catalogs and price lists, it looks fairly certain that Wollensak discontinued production of the Betax #4 in favor of the new Alphax #4 in 1948. If you remove the rear cell from your lenses in Betax shutters, do you see a date penciled or scratched into the diaphragm assembly? This is the only place I consistently find specific Wollensak production dates.
Re: New Resource for Wollensak Lenses and Shutters
You were right, a date was scratched into diaphragm assembly of: E 12 46
I have no idea what the letter E is for, but 12 46 it reasonable to guess at December 1946 for the shutter date.
That was very helpful information. Thank you.
Re: New Resource for Wollensak Lenses and Shutters
who knows anything about the Wollensak Tasope 10.5 inch lens F/8
I'm thinking it might be a Rapid Rectilinear design
any info appreciated!!
1 Attachment(s)
Re: New Resource for Wollensak Lenses and Shutters
Quote:
Originally Posted by
peter schrager
who knows anything about the Wollensak Tasope 10.5 inch lens F/8
I'm thinking it might be a Rapid Rectilinear design
any info appreciated!!
Depends on the era. You are right that pre-coating Tasopes were Rapid Rectilinear designs, essentially identical to Wollensak’s Voltas f/8 lenses. After the advent of coating the Tasope switched to a 4/4 air-spaced design.
Attachment 241256
Re: New Resource for Wollensak Lenses and Shutters
Apparently, the Tasope lenses were originally intended for process camera work.
Tasope is an acronym for "The Aurora School Of Photo Engraving".
Re: New Resource for Wollensak Lenses and Shutters
Quote:
Originally Posted by
Whir-Click
Depends on the era. You are right that pre-coating Tasopes were Rapid Rectilinear designs, essentially identical to Wollensak’s Voltas f/8 lenses. After the advent of coating the Tasope switched to a 4/4 air-spaced design.
Attachment 241256
Thank you!!