This versatile and easy-to-use Speedlight SB-700 is compatible with Nikon FX and DX format SLRs, as well as the Nikon Creative Lighting System. Incredibly intuitive to operate, it boasts a range of advanced functions that makes the quality and direction of light simple to manage. Three illumination patterns provide total control over flash coverage and the easily accessible A:B mode enables wireless control of multiple flash units too. Main features: Versatile I-TTL (intelligent TTL) Speedlight compatible with FX and DX format SLRs, and the Nikon Creative Lighting System. Read more… Multi-step power-zoom: covers a wide 24-120mm angle of view. Intuitive operation: the large, easy-to-read LCD screen and conveniently placed controls make it easy to adjust settings. Guide number: 25(EVEN)/28 (STD)/30 (CW) (FX-format, ISO 100, m, at 35mm). Maximum guide number: 38 (STD, FX-format, ISO 100, m, at 120mm). Centre-weighted, Even and Standard illumination patterns can be selected to match the shooting situation at hand. High-speed recycling time: approx. 2. 5 seconds when using NiMH or alkaline batteries and approx. 3. 5 seconds with lithium batteries. A:B mode for quick wireless control: allows control of the light ratios of A and B group Speedlight units. Firmware can be upgraded via the storage media in the attached camera. Automatic thermal protection system: warns of excessive heat build up during high intensity firing and delays recycling time if necessary. Automatic filter detection: Speedlight automatically adjusts the attached camera's color temperature settings according to the color of the filter being used. AF-Assist illumination: covers focal length of 24-135mm*. Compatible with Multi-CAM3500 AF sensors.