Nikon F 4 Instruction Manual page 101

Nikon Intervalometer MT-2
For unmanned time-lapse photography or work sampling.
Quartz-controlled MT-2 provides either 2 sec. or 16 sec. delay
shutter release, allowing time for focusing or flash recycling. It
can also be used with other remote-control devices.
Nikon Cable Release AR-3 and Double Cable Release
AR-7
Essential for slow shutter speeds, these cable releases ensure
one-hand, shutter release operation. The AR-3 and AR-7 plug
into the release terminal of the camera body.
Nikon Pistol Grip Model 2 and Connecting Cord MC-3A
Nikon's special pistol grip can be screwed into either the
camera's tripod socket or the tripod mounting collar of a
super-telephoto lens to provide more stable handheld shoot-
ing. The MC-3A Cord plugs into the remote terminal of Nikon
High Speed Battery Pack MB-21 or Nikon External Power
Regulator MB-22.
Nikon Connecting Cords MC-17 and MC-17S
Either the MC-17 or MC-17S can be used to fire two cameras
almost simultaneously. The MC-17 is approx. 3m (9.8 ft) long;
the MC-17S, approx. 0.4m (1.3 ft). The 250-Exp. Multi-Control
Back MF-24 must be attached to the master camera.