The Ricoh GF-1 External Flash is designed for the GXR camera system including the GR Digital Camera. The GF-1 attaches to the camera body via the hot shoe. However, it is independently powered using 4 'AAA' batteries. Highlights of the GF-1 include TTL flash using pre-flash, a built-in wide-angle diffuser, and catch light panels. When the wide-angle diffuser panel is used, coverage of 18mm is possible.