Canon EOS 90D DSLR Camera with 18-135mm Lens - Manual (Page 57)

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Basic Operations
Shutter Button
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 viewfi nder
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.
o If you press the shutter button completely without pressing it halfway fi rst, 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.
o Even during menu display or image playback, you can go back to shooting-
ready state by pressing the shutter button halfway.