Canon Eos Rebel T1i 500d Instruction Manual

111
The AF modes available are [Live mode], [u Live mode ] (face 
detection, p.112), and [ Quick mode] (p.116).
If you want to achieve precise focusi ng, set the lens focus mode switch 
to , magnify the image, an d focus manually (p.118).
Select the AF mode.
 Under [ 6 Live View function 
settings ], select [ AF mode ].
  While the Live View image is 
displayed, you can press < 0> to 
select the AF mode on the Quick 
Control screen.
The image sensor is used to focus.  Although AF is possible with the...

112
Using AF to FocusN
3Focus the subject.
 Aim the AF point over the subject, 
and hold down the < A> button.
X When focus is achieved, the AF point 
will turn green a nd the beeper will 
sound.
X If focus is not achieved, the AF point 
will turn red.
4Take the picture.
  Check the focus and exposure, then 
press the shutter button to take the 
picture (p.106).
With the same AF method as the Live mode, human faces are detected 
and focused. Have the target  person face the camera.
1Display the Live...

113
Using AF to FocusN
2Focus the subject.
 Press the < A> button to focus the 
face covered by the < p> frame.
X
When focus is achiev ed, the AF point will 
turn green and the beeper will sound.
X If focus is not achieved, the AF point 
will turn red.
 
If a face cannot be detected, the < > AF 
point will be displayed  and the center AF 
point will be used for focusing.
3Take the picture.
  Check the focus and exposure, then 
press the shutter button to take the 
picture (p.106).
 If the focus is way...

114
Using AF to FocusN
AF operation
 Focusing will take slightly longer.
  Even when focus has been achieved, pressing the < A> button will 
focus again.
  The image brightness may cha nge during and after the AF 
operation.
  If the light source changes while th e Live View image is displayed, 
the screen might flicker and focusi ng can be difficult. If this happens, 
stop the Live View shooting and  autofocus under the actual light 
source first.
  If you press the < u> button in the Live mode, the AF...

115
Using AF to FocusN
Shooting conditions which can make focusing difficult:
 Low-contrast subjects such as the blue sky and solid-color, flat 
surfaces.
  Subjects in low light.
  Stripes and other patterns where  there is contrast only in the 
horizontal direction.
  Under a light source whose brightness, color, or pattern keeps 
changing.
  Night scenes or points of light.
  Under fluorescent lighting or when the image flickers.
  Extremely small subjects.
  Subjects at the edge of the picture....

116
Using AF to FocusN
The dedicated AF sensor is used to  focus in the One-Shot AF mode 
(p.64), using the same AF me thod as with viewfinder shooting.
Although you can focus th e target area quickly, the Live View image 
will be interrupted momentarily during the AF operation .
1Display the Live View image.
 Press the < A> button.
X The Live View image will appear on 
the LCD monitor.
  The small boxes on the screen are 
the AF points, and the larger box is 
the magnifying frame.
2Select the AF...

117
Using AF to FocusN
3Focus the subject.
 Aim the AF point over the subject, 
and hold down the < A> button.
X The Live View image will turn off, the 
reflex mirror will go back down, and 
AF will be executed.
X When focus is achieved, the beeper 
will sound and the Live View image 
will reappear.
X The AF point used to focus will be 
displayed in red.
4Take the picture.
  Check the focus and exposure, then 
press the shutter button to take the 
picture (p.106).
 You cannot take a picture during au...

118
You can magnify the image and focus precisely manually.
1Set the lens focus mode switch to 
.
 Turn the lens focusing ring to focus 
roughly.
2Move the magnifying frame.
 Press the < S> key to move the 
magnifying frame to the position 
where you want to focus.
  To return the AF point to the center, 
press the < L> button.
3Magnify the image.
  Press the < u> button.
X The image within the magnifying 
frame will be magnified.
  Each time you press the < u> button, 
the display format will change as...

119
Notes About the Live View Image Under low or bright light  conditions, the Live View  image might not reflect 
the brightness of the captured image.
  If the light source within the image  changes, the screen might flicker. If 
this happens, stop  and resume the Live View  shooting under the actual 
light source to be used.
  If you point the camera in  a different direction, it might throw off the Live 
View image’s correct brightness mo mentarily. Wait until the brightness 
level stabilizes be...

120
Notes About the Shooting Results When you shoot continuous ly with the Live View function for a long 
period, the camera’s internal temp erature may increase and it can 
degrade image quality. Terminate Live  View shooting when not shooting 
images.
  Before taking a long exposure, stop  Live View shooting temporarily and 
wait several minutes before shoo ting. This is to prevent image 
degradation.
  Live View shooting in high temper atures and at high ISO speeds may 
cause noise or irregular...