Nikon F2 Photomic SB

If a pentaprism head with a built-in light meter was mounted on the F2, the camera became an F2 Photomic. However, since Nippon Kokagu made five different metering heads over the life of the F2, there were five different F2 Photomic versions. The use of any Photomic head requires that batteries (two S76 or A76, or SR44 or LR44) be installed in the F2 body to power the head's electronics.

With the DP-3 head, the camera became the F2 SB Photomic, available 1976 to 1977. The DP-3 introduced three innovations: a silicon photodiode light meter (a first for Nikon SLRs) for faster and more accurate light readings, a five stage center-the-LED exposure control system using +/o/− LEDs, and an eyepiece blind.

This early Photomic heads required Nikon F-mount lenses with a meter coupling shoe ("rabbit ears", see above). Rabbit ear lenses required a special mounting procedure. After mounting, the lens aperture ring must be turned back and forth to the smallest aperture (largest f-stop number) and then to the largest aperture (smallest f-stop number) to ensure that the lens and the head couple properly (Nippon Kogaku called it indexing the maximum aperture of the lens – users called it the Nikon Shuffle!) and meter correctly. This system seems unwieldy to today's photographers, but it was second nature to Nikon and Nikkormat camera using photographers of the 1960s and 1970s.


The F2 S Photomic (DP-2 head) and F2 SB Photomic (DP-3 head) also accepted the unusual Nikon DS-1 or DS-2 EE Aperture Control Units. These were early attempts by Nippon Kogaku to provide shutter priority autoexposure by having an electric servomotor automatically turn the lens aperture ring in response to the set shutter speed and light meter reading. The DS-1 and DS-2 were bulky, slow and unreliable, and were feeble and inelegant attempts to add autoexposure to the manual exposure F2.