Canon Eos Rebel T4i 650d Instruction Manual

111
f: Changing the Depth of Field
 When using an aperture with a  high f/number or shooting in low 
light scenes, note that camera shake can occur.
A higher aperture f/number will ma ke the shutter speed slower. 
Under low light, the shutter speed ca n be as long as 30 sec. In such 
cases, increase the ISO speed and hol d the camera steady or use a 
tripod.
  The depth of field depends not onl y on the aperture, but also on 
the lens and on the subject distance.
Since wide-angle lenses have a wide depth...

112
f: Changing the Depth of Field
To obtain a correct flash expos ure, the flash output will be set 
automatically to match the set a perture (autoflash exposure). The 
shutter speed will be set automatically  between 1/200 sec. - 30 sec. to 
suit the scene’s brightness.
In low light, the main subject is ex posed with the automatic flash, and 
the background is exposed with a slow  shutter speed set automatically. 
Both the subject and background look properly exposed (automatic 
slow-speed flash sync)....

113
You can set both the shutter speed and aperture manually as desired. 
While referring to the exposure level indicator in the viewfinder, you can 
set the exposure as desired. This method is called manual exposure.
* < a> stands for Manual.
1Set the Mode Dial to < a>.
2Set the shutter speed and 
aperture.
  To set the shutter speed, turn the 
 dial.
  To set the aperture, hold down the 
 button and turn the < 6> 
dial.
3Focus the subject.
  Press the shutter button halfway.
X The exposure setting will...

114
a: Manual Exposure
To obtain a correct flash expos ure, the flash output will be set 
automatically (autoflash exposure)  to match the manually-set aperture. 
The shutter speed can be set from 1/200 sec. to 30 sec.
A bulb exposure keeps the shutter open 
for as long as you hold down the shutter 
button. It can be used to photograph 
fireworks and other subjects requiring 
long exposures.
In step 2 on the preceding page, turn the 
 dial to the left to set < BULB>. 
The elapsed exposure time will be...

115
Four methods (metering modes) to measure the subject’s brightness 
are provided. Normally, evaluative metering is recommended.
In Basic Zone modes, evaluative metering is set automatically.
1Select [Metering mode].
  Under the [ z2] tab, select [Metering 
mode ], then press < 0>.
2Set the metering mode.
  Select the metering mode, then press 
.
q Evaluative metering 
This is a general-purpose metering mode suited 
even for backlit subjects. The camera sets the 
exposure automatically to suit the...

116
q Changing the Metering Mode N
e Center-weighted average metering
The brightness is metered at the image center 
and then averaged for the entire scene. This 
metering mode is for advanced users.
  With  q (evaluative metering) and  e (center-weighted average 
metering), the metering range is almo st the same as with viewfinder 
shooting.
  With  w (partial metering) and  r (spot metering), the metering 
range slightly differs from view finder shooting. The approximate 
metering ranges are as shown...

117
Set exposure compensation if the exposure (without flash) does not come out 
as desired. This feature can be used in Crea tive Zone modes (except ). You can set the exposure compensation up to ±5 stops in 1/3-stop increments.
Making it brighter:
Hold down the < O> button and 
turn the < 6> dial to the right. 
(Increased exposure)
Making it darker: Hold down the < O> button and 
turn the < 6> dial to the left. 
(Decreased exposure)
X As shown in the figure, the exposure 
level is displayed on the LCD...

118
Setting Exposure CompensationN
Set flash exposure compensation if  the flash exposure of the subject 
does not come out as desired. You  can set the exposure compensation 
up to ±2 stops in 1/3-stop increments.
1Press the  button. (7 )
X The Quick Control screen will appear 
(p.44).
2Select [ y].
 Press the < S> key to select [ y*].
X [Flash exposure comp.] will be 
displayed at the bottom.
3Set the exposure compensation amount.
  To make the flash exposure brighter, 
turn the < 6> dial to the right...

119
This feature takes exposure compensation a step further by varying the 
exposure automatically (up to ±2 stops in 1/3-stop increments) with 
three shots as shown below. You can then choose the best exposure.
This is called AEB (Auto Exposure Bracketing).
1Select [Expo.comp./AEB].
  Under the [ z2] tab, select 
[Expo.comp./AEB], then press .
2Set the AEB range.
  Turn the < 6> dial to set the AEB 
range.
  Press the < U> key to set the 
exposure compensation amount. If 
AEB is combined with exposure...

120
3 Auto Exposure BracketingN
 Follow steps 1 and 2 to turn off the AEB level display.
  The AEB setting will also be cancel ed automatically if the power 
switch is set to < 2>, flash recycling is completed, etc.
  Using AEB with continuous shooting
If  continuous shooting (p.101) is  set and you press the shutter 
button completely, the three bracketed shots will be taken 
continuously in this sequence:  standard exposure, decreased 
exposure, and increased exposure.
  Using AEB with < u> single...