Canon 199 A - Manual (Page 4)

The Canon Speedlite 199 A is a highly efficient
automatic electronic flash unit designed for
AE flash photography with Canon A-1, AE-1,
AE-1 PROGRAM. AL-1, AV-1, and New F-1
cameras. The Speedlite 199A has a unique
function which sends signals to the camera
and automatically sets the shutter speed and
f/stop.
In the case of AL-1, AV-1, and New F-1 (in
the aperture-priority and manual modes),
f/stop is set manually on the aperture ring to
same f/stop set on flash. Though it is of the
hot shoe type, this flash unit has a large light
output and increases the freedom of flash
photography with shutter speed selection
switch, tilting head, and with the joint use
of accessory motor drive or winder.
An L LSI is used for the first time in the
world in the electronic flash circuit. Together
with the computer circuit of the camera, it
has achieved a high level automatic system.
On cameras other than the A-1, AE-1, AE-1
PROGRAM, AL-1, AV-1, and New F-1, this
Speedlite 199A can be used as an ordin^
automatic electronic flash unit, i.e. setting
both the aperture on the lens and shutter
speed on the camera manually.