*Returned-film camera systems were the highest quality Earth-imaging technology ... | Hacker News

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nikital on Feb 28, 2015 | parent | context | favorite | on: Soviet Space Image Catalog

Returned-film camera systems were the highest quality Earth-imaging technology until recent linear CCD cameras. In America, returned-film systems were forbidden for civilian use

I tied to find information about these "returned-film" cameras but my Google-fu failed me. Does anyone know anything about it?

BTW, information about the other type of cameras, CCD: https://en.wikipedia.org/wiki/Charge-coupled_device

NickNameNick on Feb 28, 2015 [–]

I think they mean satellites where the film canister is physically returned to earth.

See paragraph 7 of http://en.wikipedia.org/wiki/Corona_(satellite)#Technology

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