Canon Eos Rebel T4i 650d Instruction Manual

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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 of field (range of 
acceptable focus in front of and beh ind the point of focus), you need 
not set a high aperture f/number to  obtain a sharp picture from the 
foreground to the background. On the other hand, a telephoto lens 
has a narrow depth of field.
And the closer the subject, the narro wer the depth of field. A farther 
subject will have a wider depth of field.
  Set the aperture so that the  shutter speed display does not 
blink.
If you press the shutter  button halfway and change 
the aperture while the shutter speed is displayed, 
the shutter speed display will also change to 
maintain the same exposure (amount of light 
reaching the image sensor). If you exceed the 
adjustable shutter speed  range, the shutter speed 
display will blink to indicate that the standard 
exposure cannot be obtained.
If the picture will be too dark, the “ 30” (30 sec.) shutter speed 
display will blink. If th is happens, turn the < 6> dial to the left to set 
a lower aperture f/number or increase the ISO speed.
If the picture will be too bright, the “ 4000” (1/4000 sec.) shutter 
speed display will blink.  If this happens, turn the < 6> dial to the 
right to set a higher aperture f/number or decrease the ISO speed.
Shooting Tips
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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). If you ar e handholding the camera, keep it 
steady to prevent camera shake. Using a tripod is recommended.
To prevent a slow shutter speed, under [ z1: Flash control ], set 
[Flash sync. speed in Av mode] to [ 1/200-1/60 sec. auto] or [1/200 
sec. (fixed) ] (p.215).
The aperture opening (diaphragm) changes only at the moment when 
the picture is taken. Otherwise,  the aperture remains fully open. 
Therefore, when you look at the sce ne through the viewfinder or on the 
LCD monitor, the depth of field will look narrow.
Press the depth-of-field preview button 
to stop down the lens to the current 
aperture setting and check the depth of 
field (range of acceptable focus).
D  Using the Built-in Flash
Depth of Field Preview N
While looking at the Live  View image (p.144) and ho lding down the depth-of-
field preview button, you can change th e aperture and see how the depth of 
field changes.
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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 be 
displayed in the viewfinder.
  The exposure level mark < h> 
indicates how far the current 
exposure level is from the standard 
exposure level.
4Set the exposure and take the 
picture.
  Check the exposure level and set the 
desired shutter speed and aperture.
  If the exposure compensation amount 
exceeds ±2 stops from the standard 
exposure, the end of the exposure 
level indicator will display < I> or  
in the viewfinder. (On the LCD 
monitor, if the exposure level exceeds 
±3 stops, < I> or  will be 
displayed.)
a : Manual Exposure

 + 
Exposure level markStandard exposure index
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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 
displayed on the LCD monitor.
I  Using the Built-in Flash
BULB: Bulb Exposures
  In [z2: Auto Lighting Optimizer ], if the checkmark  for [Disable 
during man expo ] is removed, it can be set in the  mode (p.123).
 
When ISO Auto is set, you can press the  button to lock the ISO speed.  After recomposing the picture, you can see the exposure level difference 
on the exposure level in dicator (p.22, 23) compar ed to when you pressed 
the < A> button.
  During the bulb exposure, do not po int the lens toward the sun. The 
sun’s heat can dam age the camera’s in ternal components.
  Since bulb exposures produce more noise than usual, the image may 
look a little grainy.
  When [z 3: Long exp. noise reduction ] is set to [Auto] or [Enable ], 
noise generated by the long ex posure can be reduced (p.125).
 For bulb exposures, using a tripod  and Remote Switch (sold separately, 
p.304) is recommended.
  You can also use a remote  controller (sold separately, p.303) for bulb 
exposures. When you press  the remote controller’s transmit button, the 
bulb exposure will star t immediately or 2 sec.  later. Press the button 
again to stop the bulb exposure.
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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 scene.
w  Partial metering
Effective when the background is much brighter 
than the subject due to backlighting, etc. The 
gray area in the left figure is where the 
brightness is metered to  obtain the standard 
exposure.
r  Spot metering
This is for metering a spec ific part of the subject 
or scene. The gray area in the left figure is 
where the brightness is metered to obtain the 
standard exposure. This metering mode is for 
advanced users.
q  Changing the Metering Mode N
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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 below:
* The figures show when [ Grid 2 m] is set. The meteri ng ranges are not 
displayed on the LCD monitor.
Metering Range During Live View Shooting
Partial metering Spot metering
With  q (evaluative metering) during viewfinder shooting, the exposure 
setting will be locked when you press the shutter button halfway and focus is 
achieved. With  w (partial metering),  r (spot metering), and  e (center-
weighted average metering), exposure  setting is set at the moment of 
exposure. (The exposure setting is no t locked when you press the shutter 
button halfway.) During Live  View shooting, the exposure setting is set at the 
moment of exposure, regardless of the me tering mode setting.
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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 monitor 
and in the viewfinder.
  After taking the picture, cancel the 
exposure compensation by setting 
it back to 0.
Setting Exposure Compensation N
O Setting Exposure Compensation
Increased exposure for a brighter image
Decreased exposure for a darker image
 The exposure compensation  amount displayed in the viewfinder goes up 
to only ±2 stops. If the exposure  compensation amount exceeds ±2 
stops, the end of t he exposure level indicator will display <
I> or .
  If you want to set exposu re compensation exceedin g ±2 stops, setting it 
with [ z2: Expo.comp./AEB ] (p.119) or with the Quick Control screen 
(p.44) is recommended.
Dark exposure Increased expo sure for a brighter image
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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 
(increased exposure). To make it 
darker, turn the  dial to the left 
(decreased exposure).
X When you press the shutter button 
halfway, the < y> icon will appear in 
the viewfinder.
  After taking the picture, cancel the 
flash exposure compensation by 
setting it back to 0.
y  Flash Exposure Compensation
If [z 2: Auto Lighting Optimizer ] (p.123) is set to any setting other than 
[ Disable ], the image may look bright even if a decreased exposure 
compensation or decr eased flash exposure compensation is set.
You can also set flash exposure compensation with [ Built-in flash settings] 
in [z 1: Flash control ] (p.216).
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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 
compensation, AEB will be applied 
centering on the exposure 
compensation amount.
  Press < 0> to set it.
  When you press the < M> button 
to exit the menu, the AEB range will 
be displayed on the LCD monitor.
3Take the picture.
  Focus and press the shutter button 
completely. The three bracketed 
shots will be taken in this sequence: 
standard exposure, decreased 
exposure, and increased exposure.
3  Auto Exposure Bracketing N
Standard exposure Darker exposure
(Decreased exposure) Brighter exposure
(Increased exposure)
AEB range
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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 shooting
Press the shutter button three time s to take the three bracketed 
shots. The three bracketed shots will be exposed in the following 
sequence: standard exposure, decreased exposure, and increased 
exposure.
  Using AEB with the self-timer or a remote controller (sold 
separately)
With the self-timer or a remote control shooting (< Q> or < l>), 
you can take three continuous shots after a 10-sec. or 2-sec. delay. 
With < q> (p.103) set, the number of co ntinuous shots will be three 
times the number set.
Canceling AEB
Shooting Tips
  AEB cannot be used  with flash, [Multi Shot Noise Reduction ], or bulb 
exposures.
  If [z 2: Auto Lighting Optimizer ] (p.123) is set to any setting other 
than [ Disable ], the AEB’s effect may be minimal.
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