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Maizenberg about Lenses

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T O P I C R E V I E W
Valkir1987	Posted - May 23 2014 : 11:59:49 AM A question about the focal lenghts of Fed and Zorki standard optics. I was wondering if any of you could tell me more. Are there other sources which tell more about the technical features of these lenses? According to Maizenberg's book, these rangefinder lenses have the following focal length: Industar 10 (Fed) f=50,00mm (which probably should be 51,6mm) Industar 22 f=52,40mm Industar 50 f=50,00mm Industar 26M f=50,00mm Jupiter 8 f=52,40mm I think both the Industar 50 and Industar 26m are made to Zeiss standard (52,40) too. Because they close focus diffirently at 1m on a Leica body. Only the Industar 10 lenses focus correctly like the Elmar.
5 L A T E S T R E P L I E S (Newest First)
Valkir1987	Posted - May 30 2014 : 3:25:53 PM Excellent, thank you!
Zoom	Posted - May 25 2014 : 1:22:39 PM quote: Originally posted by Valkir1987 Are there other sources which tell more about the technical features of these lenses? Industar-22 -- 51.39 mm Industar-26 -- 52.41 mm Industar-50 -- 52.48 mm Jupiter-8 -- 52.49 mm Sources: http://www.zenitcamera.com/archive/lenses/industar-22.html http://www.zenitcamera.com/archive/lenses/industar-26.html http://www.zenitcamera.com/archive/lenses/industar-50.html http://www.zenitcamera.com/archive/lenses/jupiter-8.html
Valkir1987	Posted - May 24 2014 : 03:46:22 AM Thank you Alexander. Very good to know! Did you find the catalogue on the wiki? The Industar 50 seems to have a rather high tolerance on its focal length: http://ussrphoto.com/Wiki/Content/files/860/Industar_50.pdf Yet the Industar 50-2 for the Zenit seems to have a focal length of 50mm again.
AlexanderK	Posted - May 23 2014 : 5:21:41 PM The information above is from the original specification. The next two I have found much faster than I thought, in the catalog from 1953: Industar 10 (Fed) f=50,00mm Industar 22 f=52,40mm Regards, Alexander
AlexanderK	Posted - May 23 2014 : 5:10:45 PM Well, these lenses have following focal length: Industar 50 f=52,40mm Industar 26M f=52,40mm Jupiter 8 f=52,40mm Unfortunately I have no information about I-10 & I-22, but I hope to find it in the next 2-3 days. Regards, Alexander

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