Canon A-1 Manuel d'utilisateur télécharger pdf (Page 149)

switch to 1/60 sec. as soon as the Speedlite

is ready for firing.

These Speedlites employ a unique light

sensing system which reduces excessive

reflection from the central area to give

better overall exposure.

With the Speedlite 199A, shutter speeds

slower than 1/60 sec. can be optionally

selected for the effect of a lighter back

ground. It is a powerful flash unit with

a guide number of 30m (ASA 100). To

control depth of field, you can choose be

tween three working apertures (f/2.8, f/5.6,

and f/11 for ASA 100 film) that are auto

matically preset by the camera as soon as the

pilot lamp comes on. The 199A also allows

bounce flash and flash coverage of a 24mm

lens field with the wide angle adapter. Its

thyristor circuit offers you continuous flash

shooting at close distances.

General Flash Photography

When you use the A-1 with flash units other

than the Speedlites 199A, 177A, 155A and

133A, set the AE mode selector to Tv and

the shutter speed to 1/60 sec. or slower.

With this setting on the camera, other types

of electronic flash units can be synchronized

with your A-1 either through the hot shoe or

via the PC socket on the front of the camera

body. These allow two separate flash units

to be fired simultaneously.

Aperture should be manually set on the

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Canon A-1 Manuel d'utilisateur Page 149