The Canon Speedlite 580EX II is a high-output flash unit dedicated to EOS cameras, automatically compatible with E-TTL II, E-TTL, and TTL autoflash. It can be used as an on-camera flash or as a master or slave unit in a wireless, multiple-Speedlite system. It has the same dust- and water-resistance as EOS-1D series cameras.
This instruction manual provides step‑by‑step guidance for installing, powering on, and using the Canon Speedlite 580EXII flash unit. It covers basic operation, battery installation, mounting the flash to a camera, and the various flash exposure modes.
The guide also details wireless flash capabilities, troubleshooting tips, and technical specifications such as battery type, dust‑and‑water resistance, supported flash metering modes, and recycling times after continuous firing.