Canon  ST-E2
SpeedLite Transmitter

Dedicated clip-on transmitter
for E-TTL/E-TTL II wireless flash system



Type 580EX/550EX-dedicated, clip-on Speedlite transmitter with direct contacts
Compatible Cameras Type A EOS cameras (E- TTL, autoflash);
Type B EOS cameras (Manual flash)
Channels 4
Flash Ratio Control For A:B ratio: 1:8 to 8:1, in half- step increments or 13 steps
High- Speed Sync (FP flash) Enabled with high-speed sync mode
Slave Operation Confirmation With test transmission button.
(Slave A fires followed by slave B at 1/64 output.)
Flash Exposure Confirmation: Before flash fires during FE lock Adequate flash exposure indicated by the flash exposure level icon lit in the viewfinder. Insufficient flash exposure indicated by the flash exposure level icon blinking in the viewfinder. After flash fires ST-E2's flash confirmation lamp lights in green for 3 sec.
Wireless slave SE mode cancellation Cancels when the test transmission button
or FE lock botton is pressed to turn on the slave unit.
Wireless Transmission Infrared pulse
Transmission Range Indoors: Approx. 12-15 meters/39.4 - 49.2 ft;
Outdoors: Approx. 8-10/ 26.2-32.8 ft
Transmission Coverage ±40° horizontal and ±30° vertical
Battery Life Approx. 1,500 transmissions
(At room temperature and with a new set of batteries)
AF-assist Beam Compatible with EOS-3's 45-point Area AF
and 28mm and longer lens focal lengths
AF-assist Beam Effective Range Approx. 0,6 to 10 m/2.0 to 16.5 ft along the periphery (in total darkness)
SE Feature While the power switch is set to I or HOLD,
the transmission turns off automatically after about 90 sec. of non-use.
Power Source 2CR5 lithium (6V) battery
Dimensions (WxHxD) 62x51x80mm
Weight 100g (exluding battery)