nikon sb-900 af speedlight flash for nikon digital slr cameras
the sb-900 i-ttl speedlight leads the nikon creative lighting system by delivering the portability power and versatility to support any photographer s creative lighting imagination . the sb-900 works as a wireless standalone flash or you can use it as a commander or wireless remote light source . in commander mode the sb-900 controls up to three remote speedlight groups and an unlimited number of compatible speedlights with four wireless channel options helping you manage wireless conflicts in multiple photographer environments . the flash also offers streamlined controls and menus including a rotary select dial that sets key flash functions quickly along with a prominent master and remote control switch to simplify wireless operation . photographers working on zoom photos will appreciate the sb-900 s expanded auto power zoom coverage which ranges from 17 to 200mm in the fx format to 12 to 200mm in the dx format . photographers also have the choice of three light distribution patterns standard for general illumination center-weighted for portraits and even for groups or interiors . finally the sb-900 automatically identifies mounted color gel filters and adjusts the camera s auto white balance setting available with select nikon digital slr cameras . other details include automatic fx dx format identification user-friendly firmware updating flash tube overheat protection and a drip-proof mounting foot cover . technical specifications guide number 34 meters 111.5 feet iso 100 48 meters 157.5 feet iso 200 electronic construction automatic insulated gate bipolar transistor igbt and series circuitry flash exposure control slow sync red-eye reduction in slow sync front curtain sync rear curtain sync rear-curtain slow sync auto fp high-speed sync fv lock flash lens coverage 17 to 200mm fx format automatic mode 12 to 200mm dx format automatic mode 12 to 17mm fx format automatic mode with built-in wide-angle panel deployed 8 to 11mm dx format automatic mode with built-in wide-angle panel deployed bounce function tilt flash head tilts down to -7 degrees or up to 90 degrees with click stops at -7 0 45 60 75 and 90 degrees bounce function rotate flash head rotates horizontally 180 degrees to the left and right with click stops at 0 30 60 90 120 150 and 180 degrees minimum recycling time 4 seconds with alkaline-manganese 1.5 volts 4.5 seconds with lithium 1.5 volts 3 seconds with oxyride 1.5 volts 2.3 seconds with ni-mh 2 600 mah flash duration 1 880 second at m1 1 full output 1 1 000 second at m1 2 output 1 2 550 second at m1 4 output 1 5 000 second at m1 8 output 1 10 000 second at m1 16 output 1 20 000 second at m1 32 output 1 35 700 second at m1 64 output 1 38 500 second at m1 128 output required power source 4 aa-type batteries in the following types alkaline-manganese 1.5 volts lithium 1.5 volts or ni-mh 1.2 volts iso range 100 to 6 400 optional power supply sd-9 high-performance battery pack sd-8a high-performance battery pack or sk-6 power bracket unit ready light yes minimum number of flashes 110 with alkaline-manganese 1.5 volts 230 with lithium 1.5 volts 190 with ni-mh 2 600 mah wireless flash modes off master master repeating remote and su-4 wireless communication channels 4 wireless groups 3 dimensions 3 x 5.7 x 4.7 inches w x h x d weight 14.6 ounces supplied accessories as-21 speedlight stand sw-13h diffusion dome sj-900 color filter set sz-2 color filter holder ss-900 soft case