Canon speedlite 550ex
The canon speedlite 550ex is the main component of a new flash system designed together with the EOS-3 SLR camera. It provides full compatibility with the new area AF technology employed by the EOS-3 and refined E-TTL autoflash for improved performance. Other main features include a maximum Guide Number of 180 (ISO 100, ft.), an AF-assist beam which links to the EOS-3's 45-point area AF, FP Flash (high speed sync), FE lock (a flash version of AE lock), and FEB (Flash Exposure Bracketing). The Speedlite 550EX also incorporates a built-in wireless transmitter, which can control other Speedlite 550EX units set up as slave units.
Guide number; 180 at ISO 100.
Head type: Bounce, swivel and zoom.
Zoom in both auto and manual mode from 24 to 105mm and down to 17mm with diffuser.
Modes; E-TTL II/E-TTL and manual mode.
Power source; 4x AA batteries.
With case and stand.