Canon A-1 - Manual (Page 173)

AE Mechanism: Electronically controlled.
Information input by means of AE mode
selector and AT dial for full-aperture AE
metering (FD lens at “A”) and stopped-
down AE metering.
Employs three LSI’s with I^L, one
Linear LSI and one Bi-MOS IC for
light metering.
.AE Mode Selection: By means of AE mode
selector. Two settings: Tv (Time value)
for shutter-speed priority -AE, Av
(Aperture value) for aperture priority AE.
Light Metering System: Through-the-lens
Central Emphasis metering by silicon
photocell located just above eyepiece
lens. Light reaches silicon photocell
after passing through fresnel lens con­
denser.
ASA Film Speed Setting: ASA6 to ASA
12800 in 1/3 step increments. With lock.
Meter Coupling Range: EV-2 (8 sec. at
f/1.4) to EV 18 (1/1000 sec. at f/16) at
AS.A 100 with FD 50mm f/1.4 lens.
Exposure Compensation: ±2 f/stop range in
1/3 f/stop increments: 1/4 " 1/2 " 1 -
2 4.
Exposure Memory: EV locked in when ex­
posure memory switch is pressed. When
pressed,
the shutter-speed/aperture com­
bination can be changed for the same
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