![]() DX lenses may produce vignetting when used on film and FX cameras. Most Nikon F-mount lenses cover a minimum of the standard 36×24 mm area of 35mm format and the Nikon FX format, while DX designated lenses cover the 24×16 mm area of the Nikon DX format, and industrial F-mount lenses have varying coverage. ![]() Many manual focus lenses can be converted to allow metering with consumer Nikon bodies by adding a Dandelion chip to the lens. For example, many electronic camera bodies cannot meter without a CPU enabled lens the aperture of G designated lenses cannot be controlled without an electronic camera body non-AI lenses (manufactured prior to 1977) can cause mechanical damage to later model bodies unless they are modified to meet the AI specification and AF-P lenses (introduced in 2016) will not focus, even manually, on cameras introduced before roughly 2013. Incompatibilities do exist, however, and adventurous F-mount users should consult product documentation in order to avoid problems. Many current autofocus F-mount lenses can be used on the original Nikon F, and the earliest manual-focus F-mount lenses of the 1960s and early 1970s can, with some modification, still be used to their fullest on all professional-class Nikon cameras. The F-mount has a significant degree of both backward and forward compatibility. Numerous other manufacturers employ the F-mount in non-photographic imaging applications. F-mount cameras include current models from Nikon, Fujifilm, Sinar, JVC, Kenko and Horseman. In addition to Nikon's own range of " Nikkor" lenses, brands of F-mount photographic lenses include Zeiss, Voigtländer, Schneider, Angénieux, Samyang, Sigma, Tokina, Tamron, Hartblei, Kiev-Arsenal, Lensbaby, and Vivitar. The F-mount has been in production for over 50 years, the only SLR lens mount with such longevity. The F-mount is also popular in scientific and industrial applications, most notably machine vision. ![]() Over 400 different Nikkor lenses are compatible with the system. The large variety of F-mount compatible lenses makes it the largest system of interchangeable flange-mount photographic lenses in history. The Nikon F-mount is one of only two SLR lens mounts (the other being the Pentax K-mount) which were not abandoned by their associated manufacturer upon the introduction of autofocus, but rather extended to meet new requirements related to metering, autofocus, and aperture control. The company continues, with the 2020 D6 model, to use variations of the same lens mount specification for its film and digital SLR cameras. The F-mount was first introduced on the Nikon F camera in 1959, and features a three-lug bayonet mount with a 44 mm throat and a flange to focal plane distance of 46.5 mm. The Nikon F-mount is a type of interchangeable lens mount developed by Nikon for its 35mm format single-lens reflex cameras. The Nikon F of 1959 embodies the original F-mount.
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