Re: [photo-3d] More on Verascope F40 (Digest Number 44)

[Bob Howard <robhoward@xxxxxxxxxxx>]

Ray and others. Up to the late '50s lens names often denoted a fixed
formula. Kodak did not bot had quailty names, e.g. Ektar top quality.
So books like Cox had good diagrams. Where one could be misled is that
lenses might be called "Cooke and allied types". Seeing a Tessar in such
a list might leave one to think it is a Cooke Triplet, which it is in a
way being three lenses but last one compound pair.
By the way Cox shows that Berthoit used "Stellar" for their Cooke
Triplet. A Leitz Elmar is a Tessar but with the diaphragm between the
first and second element. Tessar has it next to last element.
BobH


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