Canon FL 1200mm lens

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The Canon FL 1200mm f/11 was a super-telephoto lens marketed by Japanese optical manufacturer Canon in June 1972. [1] It was the longest super-telephoto lens in the Canon FL system. [2]

The lens was part of a group of four convertible lenses: 400mm f/5.6, 600mm f/5.6, 800mm f/8, and the 1200mm f/11. [3] The lenses were in two parts: a focusing and aperture control section which mounted directly to the camera using the Canon FL breech-lock bayonet mounting ring; and the head end, which determined the focal length of the lens. The control section was common to each of the four head-end sections. The 1200mm head end was a preset aperture type, so the lens had to be stopped down manually for exposure.[ citation needed ]

There are three versions, the original version has 6 elements, the second and third has 7 elements. Only the latest version was marked with "S.S.C.", which means Super Spectra Coating. The original FL 1200mm is now a rare and very valuable collector's item. The only known existence of the entire set of the four lenses in this series is in a private collection located in Pennsylvania, USA.[ citation needed ]

Technical data

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<span class="mw-page-title-main">Pentax (lens)</span>

Pentax lenses were first badged as Takumar. The Takumar branded lenses were well respected for their line of Super Takumar, which designated the high performance coating applied to the lens as well as the optical formulas used to make them. The majority of the industry at the time was still satisfied with the variations of the "plumb" coating process and later some of the two and three layer processes as well. Asahi Pentax soon introduced the Takumar Super-Multi-Coated line of lenses which was a 7 layer process as the industry had just caught up with similar forms of 5 layer multi-coated optics. Eventually Asahi Optical and Pentax slowly shifted much of their lens production under the Pentax name and transitioned some of the successful designs that were first introduced under the Takumar name to use Asahi/Pentax badging as well as beginning to use the "smc" abbreviation. Eventually the Asahi partnership disappeared and the Pentax name became solely used. Pentax lenses saw many feature changes to answer the market, such as: incorporating "Auto-Aperture" with the M42, the light weight and compactness with the 'M' series, Aperture Priority overrides with the 'A' series, and Auto-Focus with the 'F' series. Modern Pentax lenses for digital SLR cameras have seen the elimination of the aperture ring completely as found on Pentax DA and D-FA series lenses. They use the Pentax KAF mount. All of these lenses have an autofocus feature, either operated from the camera body or from an internal SDM motor. Pentax compatible lenses are also made by third-party companies.

References

  1. "FL1200mm f/11". Canon Camera Museum. Retrieved 2016-10-26.
  2. "New FL 1200mm f11.0".
  3. See description text in https://global.canon/en/c-museum/product/fl121.html and note identical rear section in the documentation picture in https://global.canon/en/c-museum/product/fl122.html