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CZJ T3M
Carl Zeiss Jena binocular coatings 1948-1991 Paul Ahnert wrote in 1961 (Beobachtungsobjekte für Liebhaberastronomen, JAB-Verlag Leipzig), that the surfaces of the lenses of Zeiss Jena amateur telescopes had a very thin reflex reducing coating. No idea whether that even had a name. I assume it... -
CZJ T3M
I, too, have been wondering, whether the coatings of 'aus JENA', 'Q1' and 'Jenoptem' models were in any way different or better because those models were for export. Let us not forget, that the East German Mark was not freely convertible and exports always had to be paid in foreign currency to... -
CZJ T3M
As far as my statement about steadily improved coatings goes: I have that information partly from stuff John A. Roberts has uploaded here. For example in a pdf entitled 'Swarovski Traditional Binoculars - Introduction of Optical and Mechanical Features' he lists DV (2 layer) mid-1948 EV (1... -
CZJ T3M
Zeiss West, Swarovski and Leica have continually improved their coatings with iterations of Swarotop, T, P and presumably the Leica equivalents too. But what about the Carl Zeiss Jena T3M multi-coating introduced in 1978? Was that ever updated until CZJ's demise in 1991?