Canon Eos Rebel T4i 650d Instruction Manual

91
i: Changing the ISO Speed N
If the ISO speed is set to [AUTO], the 
actual ISO speed to be set will be 
displayed when you press the shutter 
button halfway. As indicated on the next 
page, the ISO speed will be set 
automatically to suit the shooting mode.
ISO [AUTO]
  When you shoot at high ISO speeds,  noise (such as dots of light and 
banding) may become noticeable.
  If you use a high IS O speed and flash to shoot a close subject, 
overexposure may result.
  With ISO 12800 or “ H” (equivalent to...

92
i: Changing the ISO Speed N
*1: Fixed at ISO 400 for bulb exposures.
*2: Depends on the maxi mum ISO speed limit set.
*3: If fill flash results in ov erexposure, ISO 100 or a hi gher ISO speed will be set.
*4: Except in the  A, 6, and  F modes.
*5: Automatically set within  ISO 400 - 1600 (or up to the maximum limit) in the  C, 
2 , 3 , 4,  5 and < d> modes if you use bounce flash with an external 
Speedlite.
For ISO Auto, you can set the maximum ISO speed limit within ISO 400 
- 6400.
Under the [z3]...

93
By selecting a Picture Style, you can obtain image characteristics 
matching your photographic expression or the subject.
In Basic Zone modes, you cannot select the Picture Style.
1Press the  button.
X[Picture Style] will appear.
2Select a Picture Style.
  Press the < U> key or turn the 
< 6 > dial to select the desired 
Picture Style, then press < 0>.
D  Auto
The color tone will be adjusted to  suit the scene. The colors will 
look vivid, especially for blue  skies, greenery, and sunsets in 
nature,...

94
A Optimal Image Characteristics for the Subject N
R Landscape
For vivid blues and greens, and very sharp and crisp images. 
Effective for impressive landscapes.
S  Neutral
This Picture Style is for users who prefer to process images with 
their computer. For natural colors and subdued images.
U  Faithful
This Picture Style is for users who prefer to process images with 
their computer. When the subject is captured under a color 
temperature of 5200K, the color is adjusted colorimetrically to 
match...

95
You can select the AF (autofocus) operation characteristics suiting the 
shooting conditions or subject. In  Basic Zone modes, the optimum AF 
operation is set automatically for the respective shooting mode.
1On the lens, set the focus mode 
switch to .
2Press the  button.
X[AF operation] will appear.
3Select the AF operation.
  Press the < U> key or turn the 
< 6 > dial to select the desired AF 
operation, then press < 0>.
4Focus the subject.
  Aim the AF point over the subject and 
press the shutter...

96
f: Changing the Autofocus Operation N
This AF operation is suited for moving subjects when the focusing 
distance keeps changing. While you hold down the shutter button 
halfway, the subject will be focused continuously.
 The exposure is set at the moment the picture is taken.
  When the AF point selection (p.97)  is automatic, the camera first 
uses the center AF point to focus.  During autofocusing, if the subject 
moves away from the center AF point, focus tracking continues as 
long as the subject...

97
In Basic Zone modes, the camera will normally focus the closest subject 
automatically. Therefore, it may not always focus your target subject.
In the < d>, < s>, < f>, and < a> modes, you can select the AF 
point and use it to focus the target subject.
1Press the < S> button. (9 )
X The selected AF point will be 
displayed on the LCD monitor and in 
the viewfinder.
2Select the AF point.
  Use the < S> key to select the AF 
point.
  While looking at the viewfinder, you 
can select the AF point by...

98
S Selecting the AF Point N
 When shooting a portrait up close, use One-Shot AF and focus 
the eyes.
If you focus the eyes first, you can then recompose and the face will 
remain sharp.
  If it is difficult to focus, se lect and use the center AF point.
The center AF point is the most se nsitive among the nine AF points.
 To make it easier to focus a mo ving subject, set the camera to 
automatic AF point selection and AI Servo AF  (p.96).
The center AF point will first be  used to focus the subject....

99
S Selecting the AF Point N
With maximum apertures up to f/5.6:
Cross-type focusing (vertical and horizontal lines detected 
simultaneously) is possible with all AF  points. With certain lenses (see 
below), the off-center AF points will detect only vertical or horizontal 
lines (no cross-type focusing).
With maximum apertures up to f/2.8:*
High-precision cross-type focusing (vertical and horizontal lines 
detected simultaneously) is possible with the center AF point. The 
center AF point is about...

100
Autofocus can fail to achieve focus (viewfinder’s focus confirmation light 
< o > blinks) with certain subjects such as the following:
  Very low-contrast subjects
(Example: Blue sky, solid-color walls, etc.)
  Subjects in very low light
  Extremely backlit or reflective subjects
(Example: Car with a highly reflective body, etc.)
  Near and far subjects covered by an AF point
(Example: Animal in a cage, etc.)
  Repetitive patterns
(Example: Skyscraper windows,  computer keyboards, etc.)
In such...