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.
| Mount | Shoe |
| Guide No. | 30' (9.14 m) ISO100 at 105 mm position |
| TTL Dedication | Yes |
| Coverage | 18 mm - 105 mm (Full frame) |
| Recycle Time | Approximately 4.7 - 5 seconds |
| Power Source | 4x AA Alkaline Batteries |
| Dimensions (WxHxD) | 2.6 x 3.7 x 3.2" / 6.60 x 9.40 x 8.13 cm |
| Weight | 8.47 oz / 240 g Excluding batteries |