Add up to two stops of light from up to 100' away with this Harbor Digital Design XT-A26 XT Flash Extender Kit for select on-camera flashes. It features a dedicated mount that slides right onto the flash head without adhesives or straps and allows you to attach numerous accessories, such as the fresnel lens here that boosts power. Also, this setup uses a black box to limit light spill and includes a small dome for alternative lighting options.
Nikon: SB-900 & SB-910
In the Box
Harbor Digital Design XT-A26 XT Flash Extender Kit