Canon AE-1 Manual page 33

When the camera is used in very cold conditions: Battery performance is usually affected
by temperatures below zero C. It is always necessary to use a new battery for photography in
such extreme cold. Moreover, an extra battery should be taken along and kept warm by
placing it next to your body. The battery may not function well at low temperatures but it may
well work perfectly under normal conditions, so don't throw it away. In sudden changes of
temperature from hot to cold or vice versa, the viewfinder or this lens may get moist and fog.
Therefore, the camera should be exposed to the temperature change gradually. At least 30
minutes should be taken for a change of 10 degrees C. The camera has to be kept in a plastic
bag completely sealed and then taken out once it has been adjusted to the outside temperature
little by little.
Type: 35mm SLR (Single-Lens-Reflex) camera with electronically controlled AE (Automatic
Exposure) and focal plane shutter.
Picture Size: 24 x 36mm
Interchangeable Lenses: Canon FD series with full aperture metering and AE coupling.
Canon FL series with stopped-down metering.
Standard Lenses: Canon FD 55mm f/1.2 S.S.C; Canon FD 50mm f/1.4; S.S.C. Canon FD
50mm f/1.8 S.C. or the New FD 5omm f/1.2, New FD 50mm f/1.4 and the New FD 50mm
f/1.8.
Viewfinder Attachments: Angle Finder A2 and B, Magnifier S, Dioptric Adjustment Lens
(10 kinds), and Eyecup S.
Mirror: Instant-return, large reflector mirror with shock absorbing mechanism.
Canon AE-1 – Specifications
Lens Mount: Canon Breech-Lock mount. Canon FD,
FL and R lenses can be used.
Viewfinder: Fixed eye-level pentaprism
Field of View: 93.5% vertical and 96% horizontal
coverage of the actual picture area.
Magnification: 1:0.86 at infinity with a standard
50mm lens.