Canon 70d W User Manual

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s: Shutter-Priority AE
 If the lower f/number blinks , it indicates underexposure.
Turn the < 6> dial to set a slower  shutter speed until 
the aperture stops blinking  or set a higher ISO speed.
  If the higher f/number blinks , it indicates overexposure.
Turn the < 6> dial to set a faster  shutter speed until 
the aperture stops blinking  or set a lower ISO speed.
Shutter Speed Display
The shutter speeds from “8000” to “4” indicate the denominator of the 
fractional shutter speed. For example, “...

162
In this mode, you set the desired aperture and the camera sets the 
shutter speed automatically to obtain the standard exposure suiting the 
subject brightness. This is called aperture-priority AE. A higher f/
number (smaller aperture hole) will make more of the foreground and 
background fall within acceptable focus. On the other hand, a lower f/
number (larger aperture hole) will  make less of the foreground and 
background fall within acceptable focus.
* < f > stands for Aperture  value (aperture...

163
f: Aperture-Priority AE
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).
Depth-of-Field PreviewN
 If the “ 30” shutter speed blinks, it...

164
In this mode, you set both the shutter speed and aperture as desired. To 
determine the exposure, refer to the exposure level indicator in the 
viewfinder or use a commercially-available exposure meter. This 
method is called manual exposure.
*  stands for Manual.
1Set the Mode Dial to < a>.
2Set the ISO speed (p.120).
3Set the shutter speed and aperture.
  To set the shutter speed, turn the 
 dial.
 
To set the aperture, turn the  dial.  If it cannot be set, set the < R> 
switch downward, then turn...

165
q Selecting the Metering Mode N
1Press the  button. (9)
2Select the metering mode.
  While looking at the LCD panel, turn 
the < 6> or < 5> dial.
q : Evaluative metering
w : Partial metering
r : Spot metering
e : Center-weighted average 
metering
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.
If Auto ISO is set, the IS O speed setting will change  to suit the shutter speed 
and aperture in...

q Selecting the Metering Mode N
166
w Partial metering
Effective when the background is much brighter 
than the subject due to backlighting, etc. The 
metering is weighted at the center covering approx. 
7.7% of the viewfinder area.
r Spot metering
This is for metering a specif ic spot of the subject or 
scene. The metering is weighted at the center 
covering approx. 3.0% of the viewfinder area.
e Center-weighted average metering
The metering is weighted at  the center and then 
averaged for the entire...

167
Exposure compensation can brighten (increased exposure) or darken 
(decreased exposure) the standard exposure set by the camera.
Exposure compensation can be set in the d /s/f  shooting modes. 
Although you can set the exposure co mpensation up to ±5 stops in 1/3-
stop increments, the expo sure compensation indicator in the viewfinder 
and on the LCD panel can only display the setting up to ±3 stops. If you 
want to set the exposure compensation  setting beyond ±3 stops, use the 
Quick Control (p.50)...

168
By changing the shutter speed or aperture automatically, the camera 
brackets the exposure up to ±3 st ops in 1/3-stop increments for three 
successive shots.  This is called AEB.
* AEB stands for Auto  Exposure Bracketing.
1Select [Expo.comp./AEB].
 Under the [ z3] tab, select 
[Expo.comp./AEB ], then press 
< 0 >.
2Set the AEB range.
  Turn the < 6> dial to set the AEB 
range. Press the < U> key to set 
the exposure compensation amount.
  Press < 0> to set it.
X When you exit the menu, < h> and...

169
h Auto Exposure Bracketing (AEB) N
 During AEB shooting, < A> in the viewfinder and < h> on the LCD 
panel will blink.
  If the drive mode is set to < u> or < B>, press the shutter button three 
times for each shot. When , < i>, or  is set and you hold 
down the shutter button completely,  the three bracketed shots will be 
taken continuously and the camera  will automatically stop shooting. 
When < Q> or < k> is set, the three bracke ted shots will be taken 
continuously after a 10-sec. or 2-sec....

170
Use AE lock when the area of focus is to be different from the exposure 
metering area or when you want to take multiple shots at the same exposure 
setting. Press the 
< A > button to lock the  exposure, then recompose and take the shot. This is called AE lock.  It is effective for backlit subjects.
1Focus the subject.
 Press the shutter button halfway.
XThe exposure setting will be displayed.
2Press the < A> button. (0 )
X The < A> icon lights up in the 
viewfinder to indicate that the 
exposure...