Nikon F Photomic

Nikon F Photomic

In April 1962 Nikon introduced the first Photomic prism (see pictures below): an eye level prism finder with a CdS (cadmium sulfide) external cell but no TTL = trough the lens metering. Via a Light Acceptance Converter Tube and Incident Light Opal Plate metering is taken place. This meter is coupled to the shutter speed dial and aperture ring. Correct exposure is set by centering the meter needle visible in the viewfinder, by turning either the shutter speed dial or the aperture ring of the lens in use.