Shutter Button Operation And Autofocus - Canon EOS 1 Instructions Manual

7. Shutter Button Operation and Autofocus

The shutter button has a two step construction. Press halfway (to the first
step) to activate focusing and metering, and press completely (to the sec-
ond step) to release the shutter and make the exposure.
1
20
In-focus indicator
1. Pressing Halfway
1) This activates autofocus. When the
subject is focused, the correspond-
ing focusing point momentarily lights
red and the green in-focus indicator
lights up in the viewfinder (in One-
shot AF mode).
• The autofocus system uses five
focusing points.
• The focusing point does not light
up in automatic focus point selec-
tion mode when the AF mode is
set to AI Servo.
• The in-focus indicator does not
light up in AI Servo AF mode.
2) At the same time, the camera deter-
mines the shutter speed and aper-
ture value combination (exposure
value), and the results are displayed
in the LCD panel and viewfinder. If
you remove your finger from the
shutter button, a timer operates to
continuously display the exposure
settings for six seconds.