Canon AE-1 Manual page 30

from the center, the influence of the background is greatly reduced. Thus, the 155A offers
more appropriate exposure than the present some other third party flash units do.
Moreover, when the main switch of the Speedlite 155A is turned off, the flash circuitry is
completely cut off and the AE-1 switches over to function as an AE camera even when the
155A is mounted on it. However, there are many flash units produced by Canon that followed
which can offer similar capabilities, so you don't have to purposely hunting specifically for
the 155A in the used market.
Flash Photography with the AE-1 Flash Synchronization: X Synchronization Speed
(1/60 sec.) 1. When the AE-1 is used with the Canon Speedlite 155A, the shutter speed is
automatically adjusted to the X synchronization speed at the time the pilot lamp lights up.
When the AE-1 is used with other flash units, the shutter speed should be manually set at 1/60
sec. 2. Flash Terminal: The AE-1 offers a choice of two kinds of flash terminals; one is a
directly coupled contact of the hot shoe type, and the other is of the B type terminal, as
determined by Japanese Industrial Standards (JIS) for use with flash units with a cord. When
both flash terminals are used, two flash units can be fired simultaneously. 3. Flash
Synchronization Range:
When the camera is used with a flash unit other than the Canon Speedlite 155A o any other
similar class Canon Speedlites, be sure to set the shutter speed at 1/60 sec or below and the
aperture manually to the aperture to the f stop prescribed for automatic flash photography or
to a proper f/stop as indicated by guide number calculation.
Canon Power Winder A Winder A2 The Canon AE-1 is a very compact, lightweight
camera whose main functions respond to the electronic circuitry built into the camera body. It
is possible to photograph just the same as in general photography even when the Canon Power
winder A is attached. The Canon Power Winder A is an automatic film winder which makes
the functions of automatic photography of the Canon AE-1 outstandingly effective. It can be
attached to any Canon AE-1 directly, without any other accessory or attachment. When you
attach the Power Winder A to the Canon AE-1 and press the shutter button, the film will be
immediately wound after being exposed.