Nikon SB-910 Speedlight is a new powerful Creative Lighting System which has guide number of 34 m/111.5 ft. at ISO 100 on 35mm zoom head position with min. Recycling Time of 2.3 sec. (approx.) when use Ni-MH (2600 mAh) batteries. It features Multiple Flash Exposure Modes: i-TTL, Manual Flash, Distance-priority manual flash with automatically detect the Lens Coverage of DX or FX format camera. The Flash head tilts down to 7° or up to 90° and also rotates horizontally 180° to the left and right.
The Nikon SB-910 Speedlight also offers a Flash Compensation of –3.0 EV to +3.0 EV in increments of 1/3 steps in i-TTL auto flash, Auto Aperture flash, Non-TTL auto flash and Distance-priority manual flash modes. It provides Wireless Flash Modes with Four: 1, 2, 3 and 4 Channels of Wireless Communication. The flash measures 3.1 x 5.7 x 4.4 in. (78.5 x 145 x 113mm) with weight Approx. 14.8 oz. (420g) (without batteries).