Nikon D100 Manual page 116

Flash Photography
Nikon SB-50DX Speedlight
The SB-50DX has a guide number of 32/105 (m/ft, manual mode, 35-mm
zoom-head position, ISO 200, 20 C/68 F; GN at ISO 100 is 22/72) and is
powered by two CR123A (DL123A) three-volt lithium batteries. In addition to
auto power zoom, it has a tilt position of +90 to –18 , allowing the flash to
be used both for bounce-flash photography and at ranges as close as 30 cm
(1´). The SB-50DX supports the following flash modes: slow sync, rear-curtain
sync, and manual. If the built-in Speedlight is raised when the SB-50DX is set
to manual in the bounce-flash position, both Speedlights will fire.
The Accessory Shoe
The D100 is equipped with an accessory shoe that
allows SB-series Speedlights, including the SB-
80DX, 50DX, 30, 29s, 27, 26, 25, 24, 23, and
22s, to be mounted directly on the camera with-
out a sync cable. The accessory shoe is equipped
with a safety lock for Speedlights with a locking
pin (SB-series 29s, 27, 26, 25, and 22s). An AS-15 accessory shoe adapter
(available separately) can be attached to the shoe, allowing flash accessories
to be attached via a sync cable.
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