Canon Eos 3 Owners Manual

							51
7. When Autofocus Fails
Autofocus can fail to achieve focus (the in-focus indicator blinks) wi\
th
certain subjects such as the following:
(a) Low-contrast subjects.
(b) Subjects in low light.
(c) Extremely backlit or reflective subjects.
(d) Overlapping near and far objects.
In such cases, do one of the following:
(1)Focus an object at the same distance as the subject and lock the
focus before recomposing.
(2) Set the lens focus mode switch to  MF(or Mon older lenses) and
focus manually.
• You can also use the focusing aid. Select any focusing point and focus m\
anually
while pressing the shutter button halfway. When focus is achieved, the s\
elected
focusing point will light together with the in-focus indicator.
• When the focusing point is automatically selected or eye-selected, the c\
enter
focusing point flashes and the in-focus indicator lights when focus is a\
chieved.
• Full-time manual focus enables you to switch to manual focus anytime aft\
er the
lens starts to autofocus. This feature is available in the One-Shot AF m\
ode with
USM (Ultrasonic Motor) lenses having a distance scale.
For USM lenses with an electronic focusing ring (such as the EF 200mm f\
/1.8L),
Custom Function CF-7 may require the lens focus mode switch to be set to\
  MF(or
M ) before manual focus is enabled. See page 112.CF
If focusing cannot be achieved even while the Speedlite or ST-E2s AF-as\
sist lamp is
on, select the center focusing point to autofocus. The other focusing po\
ints might not
achieve focus as readily as the center focusing point.
 04. C836-E (33~)  28-01-2003  11:11  Pagina 51 
						

							8. Manual Focusing
When it is difficult to autofocus, focus manually as described below.Set the lens focus mode switch to
MF(or Mon older lenses).
• The AF mode indicator on the LCD panel
turns off.
Turn the lens focusing ring until the
subject is in focus in the viewfinder.
52
1
2
 04. C836-E (33~)  28-01-2003  11:11  Pagina 52 
						

							Metering Modes
The basic metering modes are evaluative, partial, spot, and
centerweighted averaging. Spot metering can be at the center of the
viewfinder or linked to the active focusing point. There is also multi-s\
pot
metering. Select the metering mode which suits the subject or your
photographic intention.
First set the < > switch to < >. If
necessary, also set the < > switch to
.
53
Evaluative metering
Partial metering
Spot metering
Centerweighted
averaging metering
 05. C836-E (53~)  28-01-2003  11:42  Pagina 53 
						

							1. Selecting a Metering Mode
While pressing the < > button,
turn the < > dial until the
desired metering mode icon
appears.Evaluative
Partial Spot
Centerweighted averaging
Release the < > button.
54
2 1
 05. C836-E (53~)  28-01-2003  11:42  Pagina 54 
						

							2. Metering Modes
Evaluative Metering ( )
This is an all-around metering mode
suited even for backlit subjects. The
viewfinder is divided into 21 metering
zones. All the focusing points are
linked to the evaluative metering
zones. After detecting the main
subject’s size, position, brightness,
background, front and back lighting,
etc., the camera sets the proper
exposure.
•In the manual focusing ( MFor M) mode,
evaluative metering centers on the center
focusing point.
• If the subject brightness and background light
level are very different (there is a strong
backlight or spotlight), use partial ( ) or spot
metering ( ) instead.
Partial Metering ( )
This mode is effective when the
background is much brighter than the
subject (due to backlighting, etc.). The
metering is weighted at center of the
viewfinder by about 8.5%.
55
Spot Metering ( )
This is for metering a particular part of
the subject or scene. The metering is
weighted at center of the viewfinder by
about 2.4%.
 05. C836-E (53~)  28-01-2003  11:42  Pagina 55 
						

							Metering Modes
Centerweighted Metering
()
The metering is weighted at the center
and then averaged for the entire
scene.
Focusing Point-Linked
Spot Metering
With Custom Function CF-13, you can
limit the manually- and eye-selectable
focusing points to only 11 of the 45.
This makes focusing point selection
faster. Spot metering (about 2.4% of
the viewfinder area) is also linked to
the eye-selected or manually-selected
focusing point.
56
Custom Function CF-13 can limit the manually- and eye-selectable focusin\
g points
to only 11 of the 45 and keep the spot metering at the center. See page \
118.CF
During continuous shooting, AE lock (with spot metering) is set automa\
tically without
the < > indicator displayed in the viewfinder.
 05. C836-E (53~)  28-01-2003  11:42  Pagina 56 
						

							Metering Modes
Multi-Spot Metering
Multiple spot meter readings can be taken and then averaged
automatically.  Up to eight spot meter readings can be taken for one
picture.
The following procedure is for taking the sample photo below.Set the metering mode to spot
metering. (See “Selecting a
Metering Mode” on page 54.)
Aim the focusing point on a
shadow portion (1) and press the
 button to take a spot meter
reading.
57
Aim the focusing point on a mid-
tone portion (2) and press the

 button. Then aim the
focusing point on a highlight portion
(3) and press the < > button.
1
2
3
(1)
(3)(2)
 05. C836-E (53~)  28-01-2003  11:42  Pagina 57 
						

							Metering Modes
Each time a spot meter reading is taken, the spot meter readings taken s\
o
far are averaged and the result (shutter speed and aperture) is displa\
yed
below the viewfinder. See the figure on the next page for “Multi-Spot\
Metering Display.” On the exposure compensation scale on the right of\
the viewfinder, the exposure level indicator moves around in real-time t\
o
indicate the spot meter reading’s current exposure level. Each spot m\
eter
reading is also indicated on the scale with a fixed (non-moving) meter\
ing
mark.
Multi-Spot Metering Display
58
Fixed metering
mark for the
first spot meter
reading Exposure setting after
the second spot meter
reading is taken.
•This is the result
(fixed) after the first
and second spot
meter readings are
averaged.
• This is repeated each
time a spot meter
reading is taken. Exposure level indicator
(moving) before the
second spot meter
reading is taken.
•
This indicator shows
the exposure level
relative to the first
spot meter reading.
Exposure level indicator
(moving) after the
second spot meter
reading is taken and
before the third spot
meter reading is taken.
• This indicator shows
the exposure level
relative to the second
spot meter reading.
 05. C836-E (53~)  28-01-2003  11:42  Pagina 58 
						

							Metering Modes
●The exposure settings obtained with multi-spot meter readings are
canceled in the following cases:
1. After a spot meter reading is taken, 16 seconds elapse.
2. You press the < >, < >, or < > button.
3. After taking the picture, you release the shutter button.
59
Up to eight spot meter readings can be taken for one picture. If you pre\
ss the < >
button to try and take a ninth spot meter reading, no spot meter reading\
 will register.
Multi-spot metering can be fixed at the center or linked to the active f\
ocusing point.
 05. C836-E (53~)  28-01-2003  11:42  Pagina 59 
						

							 05. C836-E (53~)  28-01-2003  11:42  Pagina 60