Canon Model 7S - Manual (Page 50)

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• After you have finished loading the film, be
sure to set the film speed used on the film
speed indicator window. Refer to page 13 for
setting the film speed.
The film is properly loaded and transported if
the rewind crank lever rotates when the film
wind lever is wound. If the rewind crank lever
does not rotate, it means the film was not
loaded properly. If such is the case, take out
the film as illustrated on page 27 and reload
the film.
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