Shutter - Canon EOS 55 Service Manual

Part 1: General Information
4-8 AE lock:
4-9 Multiple exposures:
5. Shutter
5-1 Type:
5-2 Shutter speeds:
5-3 Shutter release:
5-4 Release time lag:
5-5 Self-timer:
(2) Manual exposure compensation
Enabled up to ±2 EV in half steps with the Quick
Control Dial.
*
Manual exposure compensation can be set in com-
bination with AEB.
(3) ITL auto flash exposure compensation with the built-
in flash or a Speedlite
Exposure compensation is set with the function but-
ton and adjusted up to ±2 EV in half steps with the
Main Dial and Quick Control Dial.
With Speedlite 540EZ or 430EZ, flash exposure com-
pensation can be set with the Speedlite up to ±3 EV
in one-third steps.
By pressing AE lock button in a Creative Zone mode).
Since it is independent, it can be used at anytime (as
with the EOS A2E).
Max. 9 multiple exposures can be set. Can be cancelled
or reset at any time. Multiple exposure setting is reset
automatically after all multiple exposures are taken.
Vertical-travel, focal-plane shutter with all speeds elec-
tronically-controlled. Front and rear shutter curtains
both have dedicated electromagnetic release control.
(Curtain speed: 4.8 ms/24mm)
30 to 1/4000 seconds in half steps (displayed numerical-
ly), X-sync at 1 / 125 sec. Intermediate shutter speeds
(half steps) can be set in the shutter speed-priority AE
and manual exposure modes.
* No elapsed-time indication during bulb.
Soft-touch electromagnetic release.
Shutter release time lag excluding AF operation time:
1) The time lag between pressing the shutter button
completely from the halfway position and the expo-
sure of the film: 92ms
2) The time lag between pressing the shutter button
completely from the normal position and the expo-
sure of the film: 185ms
Electronically-controlled, 10-sec. delay. (After starting,
the self-timer is cancelled by turning the Command Dial
or pressing the Self-timer/Remote control button again.
The self-timer mode can be cancelled by setting the
Command Dial to Lor by pressing the Self-timer/Remote
control button again. The self-timer is also cancelled
automatically after four min. if not used.
Indication: Electronic beeper and blinking AF -Illuminator
lamp (2 Hz for 8 sec., then 8 Hz for the remaining 2 sec)
m
Pressing shutter button to SW-2 starts the self-timer.
D
Pressing shutter button to SW-2 locks up the mirror and
release the shutter two seconds later.
5-6 Camera shake warning:
If
the shutter speed is slower than the reciprocal of the
lens' focal length in the Full Auto or Programmed Image
1-10