Canon EOS 5D Mark IV L-series Zoom Lens Kit オーナーマニュアル

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Basic Shooting Operations
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The shutter button has two steps. You can press the shutter button 
halfway. Then you can further press the shutter button completely.
Pressing Halfway
This activates autofocusing and the 
automatic exposure system that sets the 
shutter speed and aperture.
The exposure setting (shutter speed and 
aperture) is displayed in the viewfinder 
and on the LCD panel for approx. 4 sec. 
(metering timer/0).
Pressing Completely
This releases the shutter and takes the 
picture.
 
Preventing Camera Shake
Hand-held camera movement during the moment of exposure is 
called camera shake. It can cause blurred pictures. To prevent 
camera shake, note the following:
• Hold and steady the camera as shown on the preceding page.
• Press the shutter button halfway to autofocus, then slowly press 
the shutter button completely.
Shutter Button
 
In the <d> <s> <f> <a> <F> shooting modes, pressing the 
<p> button will be the same as pressing the shutter button halfway.
 
If you press the shutter button completely without pressing it halfway 
first, or if you press the shutter button halfway and then press it 
completely immediately, the camera will take a moment before it takes 
the picture.
 
Even during menu display or image playback, you can go back to 
shooting-ready state by pressing the shutter button halfway.