Canon EOS 620-650 User Manual page 28

5) Focus the subject in either the ONE SHOT or SERVO mode.
6) Make sure the exposure is correct and then press the shutter
button. The self-timer operation indicator will start blinking and the
frame counter displays the countdown.
· The shutter automatically releases ten seconds after being pressed.
Two seconds before shutter release, the indicator starts blinking faster.
· To cancel the self-timer before shutter release, press the battery
check button.
· Do not stand in front of the camera when you press the shutter
button.
If your eye will not be at the viewfinder when you press the shutter
button, cover the viewfinder as shown to prevent stray light from
entering at the rear, using the viewfinder cover attached to the neck
strap shoulder pad.
Upon flash charge completion in the Program AE mode, the aperture
value and the X-sync shutter speed are automatically set. X-sync
shutter speed is set between 1/60 and 1/125 sec with the EOS 650 and
between 1/60 and 1/250 sec with the EOS 620.
(1) Use the Canon Speedlites 420e and 300 as fill-in flash in outdoor
settings as well as for normal flash when shooting at night or in a dimly-
lit room. These units feature a built-in AF auxiliary light function for dark
situations, so you can perform AF flash photography.
Fill in flash:
This technique utilizes a flash unit as an auxiliary light to prevent subject
underexposure In backlit situations. Generally, the exposure level
between the main subject illuminated by the flash and the background in
ambient light must be balanced to avoid unnatural effects. With the
Canon Speedlites 420EZ and 300EZ there is no need to balance this
exposure level because it is automatically controlled.