Overgaard Posted July 28, 2009 Share #1 Posted July 28, 2009 Advertisement (gone after registration) Helping out a friend on translations who've stumbled over the expression "percentages of transmission" Does anyone have any idea what "percentages of transmission" might refer to in photography around 1970'ies..? Link to post Share on other sites More sharing options...
Advertisement Posted July 28, 2009 Posted July 28, 2009 Hi Overgaard, Take a look here What is "percentages of transmission" in photography. I'm sure you'll find what you were looking for!
giordano Posted July 28, 2009 Share #2 Posted July 28, 2009 Helping out a friend on translations who've stumbled over the expression "percentages of transmission" Does anyone have any idea what "percentages of transmission" might refer to in photography around 1970'ies..? Most likely it's the proportion of the incoming light transmitted by the lens, as distinct from light lost through absorption. Also known as the "transmittance" of the lens; cf. "T-stop". Link to post Share on other sites More sharing options...
SJP Posted July 28, 2009 Share #3 Posted July 28, 2009 Does this help? From "The manual of photography" by R. E. Jacobson, 2000, p68, also check p69. Does anyone know this book? Looks like very solid science at a glance. Link to post Share on other sites More sharing options...
giordano Posted July 28, 2009 Share #4 Posted July 28, 2009 Does this help? From "The manual of photography" by R. E. Jacobson, 2000, p68, also check p69. Does anyone know this book? Looks like very solid science at a glance. An excellent book. Until the 1960s it was The Ilford Manual of Photography. First published 1890 and still going strong. I have the 1949 and 1978 editions. Link to post Share on other sites More sharing options...
SJP Posted July 28, 2009 Share #5 Posted July 28, 2009 Thanks, I was just digging out my dunce cap. Qoute: The ninth edition now brings this text into a third century, as the first edition dates from 1890. So optics is a well established science nothing fundamentally new here. Clicky here for more blurb. Link to post Share on other sites More sharing options...
Overgaard Posted July 28, 2009 Author Share #6 Posted July 28, 2009 Thanks, that should solve it. The text he's translating deals with the many ridiculous technical expressions such as Kelvin, f/2.8, 28mm, ISO , etc which apparently was made up by engineers without end users in mind. It should have been translated from internal factory-lingo to usage language 100 years ago! Thanks a lot! Link to post Share on other sites More sharing options...
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