Canon EOS Rebel T6i W Instruction Manual page 50

Basic Operation
Shutter Button
The shutter button has two steps. You can press the shutter button
halfway. Then you can further press the shutter button completely.
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.
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, image playback, or image recording, you can

instantly go back to shooting-ready by pressing the shutter button
halfway.
50
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
(0).
While you are pressing the shutter button
halfway, the LCD monitor is turned off
(p.270).
Pressing Completely
This releases the shutter and takes the
picture.