Canon 577 G - Manual (Page 3)

INTRODUCTION
The Speedlite 577G is Canon’s
most powerful electronic computer
flash unit with many impressive au­
tomatic and professional features.
With Canon SLR cameras, it goes
well beyond the conventional mean­
ing of automatic in flash photo­
graphy. On a Canon New F-1, A-1,
AE-1 PROGRAM, AE-1, AL-1 or AV-1
camera, it will automatically switch
the shutter speed to the flash sync
speed of 1/60 second. (1/90 sec­
ond in the case of the New F-1.)
Even the aperture will be set auto­
matically for the New F-1 (Shutter-
Priority Mode), A-1, AE-1 PROGRAM,
and AE-1 as long as the lens is on
“A”. If using one of the New F-I’s or
A-I’s slower shutter speeds is de­
sirable, that is possible too. Flash
photography with the 577G is as
easy as turning on its power switch,
selecting one of three apertures by
sliding one switch and waiting for
its pilot lamp to glow. Its many spe­
cial features and accessories offer
all of the necessary options for
obtaining beautiful and professional
results. For control of shadows and
better modeling of the subject, the
flashhead tilts upward up to 120°
and swings to the left and right
120° each way. Its unique bracket
design insures quick release of the
flash unit for varying the distance
between the flash and the camera.
And since it has a carefully mated,
separate sensor which remains in
the camera’s hot shoe, correct ex­
posure is obtained even when the
flash itself is not aimed directly at
the subject.
The 577G normally covers the angle
of view of lenses having a focal
length of at least 35mm, but with its
Wide Adapter 577G-24, flash photo­
graphy can also be done with 24 or
28mm lenses. Even flash photo­
graphy with a 20mm lens can be
accomplished by attaching the Wide
Adapter 577G-20, an optional ac­
cessory. With special synchro cords
which are available on the market
for connecting other Canon Speed-
lites, synchronized multiple flash is
another option.
* Since the Canon Speedlite 577G
does not have an internal power
source, use of the Canon Tran­
sistor Pack G, which accepts
either six C-size batteries or the
Canon rechargeable Ni-Cd Pack
TP, is required.