Exposure Control - Canon EOS 55 Service Manual

Part 1: General Information
4. Exposure Control
4-1 Metering modes:
4-2 AE modes:
Autofocus is possible providing the eye is placed close to
the eyepiece. It is not possible with eyeglasses.
A magnifier cannot be used with eye-controlled focus.
TIL max. aperture metering with a 6-zone silicon photo-
cell. The following three metering modes are provided:
(1)
Evaluative (coupling to any of the three focusing
points)
(2) Approx. 9.5-percent partial (9 mm dia.)
m
Partial metering at center.
l'I
Partial metering linked to focusing point selected with
the Main Dial or by Eye-Controlled Autofocus.
(When the focusing point is camera-selected, partial
metering is fixed at the center.)
(3) Center-weighted averaging metering
1.
Intelligent program AE (Shiftable)
2. Shutter speed-priority AE (No safety shift feature)
3. Aperture-priority AE (No safety shift feature)
4. Depth-of-field AE (Shiftable)
1)
When the focusing point has been selected with the
Main Dial, the selected focusing point is used to set
the two depth-of-field points.
2) When the focusing point is camera-selected, the
center focusing point selects the two depth-of-field
points.
3) With Eye-Controlled Autofocus, the two depth-of-
field points can be set with any of the focusing
points respectively selected by the eye. The posi-
tion of the eye when the shutter button is pressed
halfway the third time selects the focusing point-
linked zone where evaluative or partial metering is
to be weighted.
5. Full Auto (Intelligent Program AE not shiftable)
6. Programmed Image Control modes
Portrait, Landscape, Close-up, and Sports
7. E-TIL program flash AE
8. A-TIL program flash AE
9. TIL program flash AE
10. Metered manual exposure
*
The following table shows the settings which are set
automatically (indicated by a black dot) by the cam-
era or which can be set by the user (indicated by a
white dot) in the Programmed Image Control modes.
When the Speedlite is set to A,
it
fires automatically
under low-light or backlit conditions.
Also, Programmed Image Control modes override all
Custom Function settings.
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