Nikon F3 - Manual (Page 58)

ACCESSORIES —continued-
40
Speedlights
Designed to complement the versatility of the F3, the
Nikon SB-12 is a direct-mounting electronic flash unit
offering fully automatic through-the-lens flash output
control. Even with the camera on automatic, the proper
synchronization speed of 1/80 sec. is automatically set.
Then, while the shutter is open, the camera's Silicon
Photo Diode reads the light reflected off the film and tells
the flash unit to cut itself off when the exposure is correct.
With a guide number of 25 (ASA 100 and meters) or 40
(ASA 25 and feet), the SB-12 Speedlight provides just the
right amount of light for subjects located between 0.6m—
15m (2ft—49ft). As soon as the flash is recycled and ready
to fire, an LED ready-light inside the finder goes on. The
same LED blinks to let you know when the light is
insufficient for proper exposure.
And for those photographers needing even more power
and versatility, Nikon has created the SB-11 Speedlight.
It has a guide number of 36 (ASA 100 and meters) or 60
(ASA 25 and feet) and gives you a choice of three auto­
matic shooting apertures—f/4, f/5.6, and f/8 at ASA 100.
When used with the F3 via a special TTL connecting
cord, it provides the same automatic through-the-lens
control of the flash exposure as the SB-12. Other features
include a bounce head and a removable sensor for auto­
matic use with other cameras.