Nikon SB 900 User Manual - Page 106
Red-eye reduction/Red-eye reduction with slow-sync flash, Rear-curtain sync
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Available functions to be set on the camera ■ Red-eye reduction/Red-eye reduction with slow-sync flash To prevent your subject's eyes from appearing red in color pictures shot in dim light, the SB-900 fires three flashes at reduced output just before the picture is taken. • In the Red-eye reduction with slow sync flash, red-eye reduction is combined with slow-sync flash. • Since slow shutter speeds are normally used in red-eye reduction with slow-sync flash, use of a tripod is recommended to prevent camera shake. ■ Rear-curtain sync In normal flash photography, when shooting fast-moving subjects at slow shutter speeds, unnatural-looking pictures can occur, because the subject frozen by the flash appears behind or within the blurred movement (see photo below right). Rear-curtain flash sync creates a picture in which the blur of a moving subject (for D example, the taillights of a car) appears behind the subject and not in front. • In front-curtain sync, the flash fires immediately after the front curtain opens completely; in rear-curtain sync, the flash fires just before the rear curtain starts to close. • Since slow shutter speeds are usually used, use a tripod to prevent camera shake. • This function does not operate in Repeating flash operation. • In multiple flash, the master flash unit can be set to either front-curtain or rearcurtain sync flash. However, the remote units cannot be set to rear-curtain sync flash. (kD-39) Flash modes and functions Front-curtain sync Rear-curtain sync D-56