The external bayonet is used to mount longer and heavier lenses where the built-in helicoid would not be strong enough to rotate the lens barrel. Focusing of such lenses could be done by rotating the toothed wheel on the top front of the camera body or by rotating the lens barrel itself (the distance scale is on the camera body). As a consequence, the 5 cm f/1.4 lens that was normally sold with the body is extremely small (about the size of a golf ball) since the lens contains the optics only. Lenses that use the bayonet inside the camera need have no focusing helicoid built into the lens barrel. The mount itself has two bayonets, one inside the camera and another outside. Some early Nikkors used this mark to denote that the lenses were coated. This is not to be confused with a "C" mark used as a suffix to the serial number. Each was marked with a "C" on the side of the lens barrel. These were the 85mm, 105mm, and 135mm lenses.
Nikon made a small number of longer focal length lenses specifically designed to focus properly when mounted on a Contax.
The mount was a copy of the Zeiss Ikon Contax rangefinder mount, however, small differences between the two mean that although Zeiss wide-angle lenses can be used on the Nikon cameras and vice versa, the longer lenses (50 mm and above), if used, will not be able to focus at both close range and infinity.
The lenses were sold under the name Nikkor. The Nikon S-mount is a type of interchangeable lens mount used by a series of Nikon 35mm rangefinder cameras ( Nikon I, Nikon M, Nikon S, Nikon S2, Nikon SP, Nikon S3, Nikon S4). Nikon SP of 1957, above, and Nikon S3 of 1958, below
0 kommentar(er)
