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The Length of Unexposed Film Left in a Cassette

Published online by Cambridge University Press:  03 November 2016

G. Hoffmann De Visme
G. Hoffmann De Visme*
Affiliation:
Department of Electrical Engineering and Electronics, University of Manchester Institute of Science and Technology, Manchester, 1
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Extract

Engineers photographing oscilloscope traces often want to know how much film is left in a cassette after some of the original film has been exposed and cut off. The obvious way to find out is to open the cassette in a dark room and measure the length left inside. Alternatively of course the length can be found by weighing or if the amounts of film originally present and used are known. Another way, unfortunately only of academic interest, is suggested below.

Type
Research Article
Information
The Mathematical Gazette , Volume 53 , Issue 384 , May 1969 , pp. 139 - 141
Copyright
Copyright © Mathematical Association 1969

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