Canon EOS 20D Service Manual page 33

General Information
8-8 AE Lock:
8-9 Multiple exposures:
9. Shutter
9-1 Type:
9-2 Shutter speeds:
9-3 Shutter release:
9-4 Shutter-release time lag: 1) During SW-1 ON, time lag between SW-2 ON
(5) AEB cancellation: Set the AEB amount to
0.
• With C.Fn-09 (Bracketing sequence/Auto
cancel), AEB can be canceled afterward
automatically or not. (If the flash is ready
or the flash button is ON, AEB will be
canceled afterward automatically
regardless of the C.Fn-09 setting.)
1) Auto AE lock
• In the One-Shot AF mode with evaluative
metering, AE lock takes effect when focus
is achieved.
2) Manual AE lock
(1) Enabled with AE lock button. (Pressing the
button again renews AE lock.)
(2) No AE lock in Basic Zone modes.
(3) During evaluative metering, AE lock
centers on the selected AF point. During
partial metering at the center or
centerweighted averaged metering, AE lock
centers on the center AF point.
(4) When the built-in flash or an EX-series
Speedlite is used, the AE lock button works
as an FE lock button.
Not possible
Vertical-travel, mechanical, focal-plane shutter
with all speeds electronically-controlled
• Mechanical shutter: 1st and 2nd shutter
curtains both have dedicated magnet
control. (Curtain speed: 2.4 ms)
1/8000 sec. to 30 sec. X-sync at 1/250 sec.
(1) Settable in 1/3- and 1/2-stop increments
in shutter speed-priority AE and manual
modes.
(2) For bulb exposures, the elapsed exposure
time is displayed on the LCD panel.
(3) Max. continuous bulb exposure is approx.
2.5 hours.
Soft-touch electromagnetic release
and start of exposure: Approx. 65 ms
2) Time lag between simultaneous SW-1/SW-2
ON and start of exposure: Approx. 85 ms
Note: Excludes the aperture stop-down time (up to 3.5 stops)
and AF operation time.
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