Canon AT 1 - Manual (Page 15)

Shutter: Cloth focal plane shutter with four
spindles. Shock and noise damping
mechanisms are incorporated. All shutter
speeds are electronically controlled.
Shutter Speeds: 1/1000, 1/500, 1/250,
1/125, 1/60, 1/30, 1/15, 1/8, 1/4, 1/2, 1,
2 (seconds) and B.
X synchronization is at 1/60 seconds.
Shutter Speed Dial: The shutter speed dial is
on the same axis as the film advance
lever. The number 2 for two seconds is
marked in orange; other numbers as well
as X synchronization are in white. There
is a shutter dial guard to prevent uninten­
tional movement of the dial. The ASA
dial is located underneath the shutter
speed dial.
Self-Timer: Electronically controlled self-
timer. After the self-timer lever is pushed
forward, the self-timer is activated by the
shutter release button. The self-timer
releases the shutter after a time lag of 10
seconds. A self-timer LED lamp blinks on
and off when the self-timer is in
operation. The self-timer operation can
be cancelled while in operation.