Model Name: Canon 550EX Speedlite Flash Unit Flashgun | |
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Image: | ![]() |
Fivercam Price (used) UK | |
eBay Price (used) UK | |
Release Date | |
Strenght / Power | |
Guide Number (ISO100, meters) ![]() | Normal Mode (ISO 100)High-Speed Sync (FP Flash, ISO 100) |
Power Level Switching (Vari-power Range) | |
Head & Coverage | |
Bounce (Up-Down) Head Movement | |
Swivel (Rotation) Head movement | |
Focal Length Coverage ![]() | 24mm (APS-C 15mm) |
Auto Zoom Head ![]() | |
Flash Related Functions | |
Flash Durations ![]() | |
Flash Modes(TTL) ![]() | E-TTL II/E-TTL |
Flash Exposure Compensation / Correction ![]() | |
Secondary Illumination ![]() | |
Wireles Flash | |
Wireless Operation ![]() | |
Wireless Groups ![]() | |
Wireless Channels | 4 |
Remote Timing Modes | 3 |
Other Features | |
Mount | Hot-shoe mount flash |
Off Camera Terminal / External Connectors | |
Included Accessories | |
Other Functions | |
Power Source & Recycle Time | |
Power Source - Batterry | |
External Power | |
Minimum Recycle Time (Charging time between shooting) ![]() | |
Battery Life ![]() | Approx. 100-700 (flashes per set of batteries) |
Dimensions & Weight | |
Dimensions | 3.1 x 5.4 x 4.4" (80 x 138 x 112mm) |
Weight | 14.2 oz (405g) |
More Details or Support Website: | Link |
Item 1 |
There are three ways to trigger off-camera flash units wirelessly: via infrared, radio signals or a hybrid method that involves both infrared and radio. The infrared system works like the TV remote; there need to be a direct line of sight for the signal to reach the destination. The radio signal has no line-of-sight limitations, but comes at a rather high cost. The hybrid system simply takes the infrared signal from the commander, converts it over to radio and then converts it back to infrared on slave units.
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