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Title: Watkins' focal plane meter, c. 1907. [Go to resource]
Description: Watkins' focal plane meter, c. 1907. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: exposure meter Temporal: 1907 Source: Science Museum Creator: Watkins, Alfred Identifier: 1927-948 Go to resource More Like this...
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