Focus lock, Shutter button action and focusing – Canon EOS 100 User Manual

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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.