Accessory Shoe; Sync Terminal - Nikon D1 Manual

Accessory shoe

The SB-28DX, SB-28, SB-27, SB-26, SB-25,
SB-24, SB-23, SB-22s, and SB-29 Speedlights
can be attached directly to the accessory shoe
without a sync cable. The shoe is equipped with
a safety lock that keeps the Speedlight affixed to
the camera when Speedlights provided with a
locking pin (the SB-28DX, SB-28, SB-27, SB-
26, SB-25, SB-22s, and SB-29) are attached.

Sync terminal

A sync cable can be attached to the camera's
sync terminal.
Flash-ready indicator
When the SB-28DX, SB-28, SB-27, SB-26, SB-25, SB-24, SB-23, SB-22s, and
SB-29 Speedlights are connected, the flash-ready indicator lights up when the
flash is fully charged and ready for use. If the flash-ready indicator blinks for
about three seconds after a photograph is taken with a flash set to TTL or
external automatic mode, the photograph may be underexposed. Check the
photograph in the LCD monitor. If it is underexposed, adjust the focus
distance, aperture, or flash range and try again.
Note
Do not attach a flash to the sync terminal when performing rear-curtain sync flash
photography with a Speedlight attached to the accessory shoe.
Flash Photography: Through-the-Lens Flash Photography
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