57v Notes on performing multiple flash (common to both wirelessand wired operation)• To avoid accidental firing, turn off the camera and all flash units before mounting themaster flash unit on or connecting it to the camera.• The SB-600’s, SB-800’s and SB-80DX’s standby functions are canceled while theSB-50DX’s standby duration is prolonged to approx. one hour when they are set towireless remote flash mode.• Set the angle of coverage of the remote flash units wider than the picture angle, so thatthe subject will receive sufficient illumination even when the angle of the flash head is offaxis from the subject. (In Advanced Wireless Lighting, the zoom-head position isautomatically set to 24 mm, except when the wide-flash adapter is attached.)Remember, the closer the subject, the wider the angle of coverage required.• The brightness of the flash illumination is inversely proportional to the square of thedistance between the flash unit and the subject. For example, if the distance betweenSpeedlight A and the subject is 1 m (3.3 ft.), and Speedlight B is 2 m (6.6 ft.), thecombined brightness of the two Speedlights will be:A : B = 1 2 : 22 = 1 : 4 (in meters) or 3.3 2 : 6.6 2 = approx. 11 : 44 (in feet)Therefore, the illumination provided by Speedlight A is four times (or two steps) brighterthan that provided by Speedlight B.• To ensure good results, it’s recommended to make test shots before shootingimportant events.• Be sure to read the instruction manuals of your camera and Speedlight(s) before use.Advanced operationsAll manuals and user guides at all-guides.com