Canon 420 EZ - Manual (Page 24)

other Operations
A-TTL Automatic Mode;
The Speedlite 420EZ features the A (Ad-
vanced)-TTL mode which can be used
under conditions ranging from total dark­
ness to fill-in flash.
Flash output is controlled by directly
measuring the light coming through the lens
and reflected from the film surface, using
the sensor inside the camera body. More­
over, this A-TTL mode balances the ex­
posure between the main subject illumi­
nated by the flash and the background in
ambient light to prevent unnatural effects.
The setting for each shooting mode is
slightly different so please read the
following carefully.
• The camera-shake warning does not
sound when the flash is turned ON.
• When the camera is set to the depth-of-
field AE mode with the flash ON, the
mode is automatically switched to the
program AE mode.