The PowerShot G11 is compatible with the Speedlite flash series intended for all EOS series SLR cameras. Attach a Speedlite flash to the hot shoe, then you can set and control the flash on the "Flash Control" menu in the camera. With a Speedlight, the G11 is given extra functions such as autoflash metering, FE lock and Flash exposure compensation; continuous shooting with external flash. Also Canon's Speedlite Transmitter ST-E2 enables you to have multiple slave flashes and wireless control. A Tele-Coverter lens designed for the G11 and WP-DC34 Waterproof Case are also available.