DF Flash Diffuser Softbox For Camera Nikon SB800 SB600 Canon 580EX 430EX 420EZ This SoftBox can enlarges and diffuses the light with the flash in the direct flash position. To soften shadows and eliminate unpleasant red eye. Meanwhile, it does not block either exposure sensors or auto focus assist beams on most flashes. Light Loss: Approximately 1/2 stop. Size of the diffuser surface: 30cm x 27cm.