| Type |
550EX-dedicated, clip-on Speedlite transmitter
with direct contacts |
| Compatible Cameras |
Type A EOS cameras (E- TTL, autoflash); Type B
EOS cameras (Manual flash) |
| Sync Speed |
High-Speed Sync (FP flash): Enabled with
high-speed sync mode |
| Flash Exposure Confirmation |
1. 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. |
| |
2. After flash fires ST-E2's flash
confirmation lamp lights in green for 3 sec. |
| AF Assist Beam |
Compatible with EOS-3's 45-point Area AF and
28mm and longer lens focal lengths |
| |
Effective Range: Approx. 0.6 to 10m/2.0 to
16.5 ft along the periphery (in total darkness). |
| Wireless Functions |
|
| Transmission System |
Infrared pulse |
| Transmission Range |
Indoors: Approx. 12-15 m/39.4 - 49.2 ft;
Outdoors: Approx. 8-10 m/ 26.2-32.8 ft |
| Flash Ratio Control |
For A:B ratio: 1:8 to 8:1, in half- step
increments or 13 steps |
| Flash Coverage |
Transmission Coverage: +/-40 degrees
horizontal and +/-30 degrees vertical |
| Slave Operation Confirmation |
With test transmission button. |
| |
*Slave A fires followed by slave B at 1/64
output. |
| Slave Unit SE Mode Cancellation |
Cancels when the test transmission button or
FE lock botton is pressed to turn on the slave unit. |
| Power Source |
2CR2 lithium (6V) battery x 1 |
| |
Battery Life: Approx. 1,500 transmissions (At
room temperature and with a new set of batteries) |
| SE Mode |
While the power switch is set to I or HOLD,
the transmission turns off automatically after about 90 sec. of
non-use. |
| Dimensions |
62 (W) x 51 (H) x 80 (D)mm/2.4 (W) x 3.1 (D)
in |
| Weight |
100g/3.5 oz (exluding battery) |
