Difference between revisions of "K mount lenses"
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| − | The '''K mount''' was introduced by [[Pentax]] in 1975 of | + | The '''K mount''' was introduced by [[Pentax]] in 1975 with their line of [[http://camera-wiki.org/wiki/Pentax_K2|K series bodies]]. The K mount was initially a joint development betwee Pentax and Zeiss, that never materialized and in order to maintain compatibility, it was decided to retain the same flange/film distance as the [[M42]] screw mount lens mount (46.42mm). '''K-Mount''' was introduced as open standard, meaning that a handful camera makers soon offered SLR bodies and lenses with K-mount, for example [[Cosina]], [[Chinon]] and [[Zenit]]. The mount standard has been revised and extended several times (e.g. to add autofocus) and remains in use on Pentax's <!---2015> [[DSLR]]s.<ref name="KPage">Bojidar Dimitrov's Pentax K-Mount Page [http://kmp.pentaxians.eu/technology/k-mount/k/ ]</ref> |
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Viewing a K-mount lens from the rear (with the focus index mark at 12 o'clock), the aperture stop-down lever is at about 4 o'clock; and between 8 and 10 o'clock is a slider reflecting the current aperture-ring position, to allow for open-aperture light metering. These features are universal to all K-mount lenses. An autofocus KAF lens also adds a drive-screw slot at about 8 o'clock. | Viewing a K-mount lens from the rear (with the focus index mark at 12 o'clock), the aperture stop-down lever is at about 4 o'clock; and between 8 and 10 o'clock is a slider reflecting the current aperture-ring position, to allow for open-aperture light metering. These features are universal to all K-mount lenses. An autofocus KAF lens also adds a drive-screw slot at about 8 o'clock. | ||
Revision as of 18:37, 9 August 2021
The K mount was introduced by Pentax in 1975 with their line of [series bodies]. The K mount was initially a joint development betwee Pentax and Zeiss, that never materialized and in order to maintain compatibility, it was decided to retain the same flange/film distance as the M42 screw mount lens mount (46.42mm). K-Mount was introduced as open standard, meaning that a handful camera makers soon offered SLR bodies and lenses with K-mount, for example Cosina, Chinon and Zenit. The mount standard has been revised and extended several times (e.g. to add autofocus) and remains in use on Pentax's
