Focus lock, Shutter button action and focusing – Canon EOS 100 User Manual
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3.
Shutter Button Action and Focusing
EOS cameras use a two-step shutter but
ton. Pressing the button “halfway” (to the
first step) focuses the subject and deter
mines the exposure (shutter speed and
aperture value), which is displayed in the
LCD panel and viewfinder. Pressing the
button “completely” (to the second step)
takes the picture and winds the film to the
next frame.
* Set the command dial to a for practic
ing the following procedure.
1) Look through the viewfinder and turn the
zoom ring to set the desired subject
size.
Focus lock
By keeping the shutter button pressed
halfway after the subject is focused, the
focus and exposure settings remain
locked allowing you to recompose the
scene as desired.
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