Owner's Manual

10
N TECHNICAL EXPLANATION OF THE CAMERA
The Canon EF is a 35mm single-lens-reflex AE
(automatic exposure) camera which is designed for
fast handling and precise exposure control . Being
mOdularly
constructed, it contains many advanced
electronic
circuits to make picture-taking easier than
ever before.
A Electro-Mechanical Shutter
The
vertically moving metal focal plane shutter in
the EF
has speeds from 1/1000 sec . down to a full
30 seconds, plus a "B" (Bulb) setting for manual
time exposures. The shutter is electronically con-
trolled in its slow range from 1-30 sec . in six discrete
steps
(1 , 2,4,8,15 , and 30) . The red Light Emitting
Diode (LED), just to the left of the pentaprism,
blinks on and off to indicate when the shutter is
open. I n the no~mal range in which most photog-
raphy will be performed, the shutter is mechani-
cally
controlled from 1/2-1/1000 sec ., plus B, in
eleven steps
(1/2,1/4 , 1/8,1/15,1/30,1/60,1/125,
1/250,1/500,1/1000, and B) . Electronic control of
the shutter in the slow range insures high accuracy
for long shutter speeds, whereas mechanical control
in the normal range permits manual operation of the