Film plane indicator – Canon AE-1 User Manual

Page 98

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Film Plane Indicator

This mark is engraved on the top of the

camera between the film rewind crank and

the battery check button, just to the left of
the pentaprism, to indicate the exact position
of the film plane. The distance scale on the

lens shows subject distances measured from

the film plane indicator. This mark is not used

in general photography, but in close-ups and
macrophotography it is often used to obtain

the exact subject distance.