Nikkorex F Camera with Nikkorex Lens and Meter
The Nikkorex F Camera had its own coupled meter, and a couple of lenses made by Mamiya. This is a Nikkorex F, with the (Mamiya) Nikkorex-Sekor 35mm f/2.8, and with the Nikkorex coupled meter attached. The Nikkorex-Sekor lens is not meter coupled in any way (and is semi-automatic), having a lever for "cocking" the aperture which must be activated to reopen the lens after each exposure. The meter can be used with such a lens, in which case it is set to the film speed in use, is coupled to the shutter speed dial only, and the needle's readout is an aperture to be manually set by the photographer for that particular shutter speed. When used with a "pronged" lens the lens is mounted with the f-stop set at f/5.6, in which case it engages the "prong" of the lens with its own pin. This couples the lens's aperture to the meter. The maximum aperture of the lens is then set on a dial on the meter at a point which is just opposite the film speed in use. This indexes the maximum aperture of the lens to the meter and allows direct setting of the exposure with movement of either the shutter speed dial or the aperture ring, or both, to match the meter's needle, in a manner that the meter reflects both the shutter speed and aperture in use.
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Last updated 7 Feb 2002