Series IV no. 4 is shown as covering 11x14".
Series III (?) 6a size is down as 11x14" too!
Excellent!
I believe the Euryscope series lV No. 4 have f6 aperture?
What about 6A?
Thank you very much Steven.
Last edited by bracan; 20-Oct-2013 at 11:21. Reason: mispelling
Series III is nominally F4.5. Matches well with the efl of 15 1/3" and front lens diameter of 3.5".
Believe or not, I found a 5a for sale in Northern Europe to-day. Not very common, though.
A 6A euryscop could be a series III, or a series VI. Series III is the f4.5 portrait euryscop, series VI is a F7 more or less standard aplanat type lens
Cheers
Tim
Series IV No. 4 = That serial number places it mid 1890s. It is an f/6, 14 1/3 FL for 10x12 wide open and 11x14 stopped down.
6a if Series III = F/4.5 covering 11x14
6a if Series VI = F/7.75 covering 18x22 wide open and 20x24 stopped down
Per 1890 Catalogue = http://antiquecameras.net/1890lenscatalogue.html
Dan
Antique & Classic Camera Blog
www.antiquecameras.net/blog.html
Thanks guys on infos!
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