- Twin-tube ring lite designed for close-up photography with EF Macro lenses; Flash tubes can fire together or independently.
- Compatible with all EOS bodies.
- Supports E-TTL Wireless Autoflash in conjunction with one or more 550EXs.
- Incandescent focusing lamps and two forms of modeling flash permit preview of lighting effects.
- Illuminated LCD panel for easy flash settings in any lighting condition.