Nikon SB-910 Aufofocus Speedlight

The Nikon SB-910 is a high-performance Speedlight compatible with Nikon Creative Lighting System (CLS) with a guide number of 34/48 (ISO 100/200, m) (111.5/157.5, ft) (at the 35 mm zoom head position in Nikon FX format with standard illumination pattern, 20 °C/68 °F).