Nomenclature - Canon ST-E2 Instruction Manual

Nomenclature

AF-assist beam
emitter
About the AF-Assist Beam
Under low-light or low-contrast conditions, the built-in AF-assist beam
will be emitted automatically to make it eaasier to autofocus. The ST-
E2's AF-assist beam is compatible with the AF points of almost all EOS
cameras. The AF-assist beam is compatible with 28mm and longer
lenses. The effective range is shown below.
4
Transmitter
Locking pin
Position
Center
Periphery
Contacts
Effective Range (m / ft)
0.6 - 10 / 2 - 32.8
0.6 - 5 / 2 - 16.4
Mounting foot's
lock lever
Mounting foot