Nikon Speedlite SB-800 - Manual (Page 66)

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Auto FP High-Speed Sync mode
(for compatible cameras)
High-Speed flash synchronization at your camera’s highest shutter speed is
now possible. In this mode, the Auto FP High-Speed Sync mode is
automatically set when the shutter speed exceeds the camera’s sync shutter
speed. This is useful when you want to use a wider aperture to achieve shallow
depth of field to blur the background.
• Available with compatible cameras. You cannot set the Auto FP High-Speed sync mode
on the SB-800 directly, but must set it on the camera.
• High-speed flash synchronization is possible exceeding your camera’s sync shutter
speed up to your camera’s highest shutter speed.
• Auto FP High-Speed sync also operates in the Advanced Wireless Lighting mode.
• Available flash modes are i-TTL, Auto Aperture flash, Distance-priority manual flash, and
Manual flash when using a single flash unit. i-TTL, Auto Aperture flash, Non-TTL auto
flash, and Manual flash are available in multiple flash operation.