Nikon SB-21B Macro Speedlight Flash

TTL Macro Speedlight SB-21 A/B For Brilliant Close-Up Detail FEATURES INCLUDE: Designed specifically for close-up photography Dual, rotatable flash tubes allow you to select flat front lighting or selected relief lighting Advanced electronics assure consistent exposure control with variable output Built-in focus illuminator aids manual focusing Further lighting enhancement is possible using secondary lighting or reflector systems (because exposure control can be completely automatic, no special calculations are required when using these systems) Ideally suited for use with all Micro-Nikkor lenses. SB-21A for F3-series cameras. Includes AS-12 controller SB-21B for ISO shoe (F5, F4-series N90s, N70, N6006, N6000 and N50). Includes AS-14 controller Guide number (ISO 100 in feet) 43 with internal batteries (49 with external power source) Recycling time approximately 8 seconds at manual full output.