Archive for: zoom

Patent: Canon 11-24mm f/4 Lens

Patent: Canon 11-24mm f/4 Lens

Egami has shown that Canon has filed a patent for an ultra-wide angle zoom:

(Translated)

Description and self-interpretation of the patent literature

Patent Publication No. 2014-10286

  • Publication date 2014.1.20
  • Filing date 2012.6.29

  • Example 1

  • Zoom ratio 2.06
  • Focal length f = 11.30-18.00-23.30mm
  • Fno. 4.10
  • Half angle ω = 62.42-50.24-42.88mm
  • Image height Y = 21.64mm
  • 172.19-161.28-162.86mm overall length of the lens
  • BF 38.82-52.31-63.15mm

  • Canon users have been left out in this focal range for quite some time. With Nikon and their legendary 14-24mm f/2.8G ED and other third party offerings filling up the gap in the market. Can Canon produce an optically superior lens that also has such a shallow depth of field? Until they do, the only wide-angle zooms that Canon makes that come close are the 16-35 f/2.8 L II or the 8-15mm f/4L Fisheye.

    [Egami]

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    Canon Announces New PL Mount Cine Zooms

    Canon Announces New PL Mount Cine Zooms

    LAKE SUCCESS, N.Y., April 7, 2011 – Canon U.S.A., Inc., a leader in digital imaging, today introduced two advanced-design PL-mount lenses that address the emerging 4K production standards. Designated as the Canon FK14.5-60 wide-angle cine zoom and the Canon FK30-300 telephoto cine zoom, these precision-matched lenses incorporate breakthrough Canon optical designs that simultaneously optimize and enhance multiple imaging attributes while minimizing optical aberrations and distortions. Both lenses are also more compact and lightweight than contemporary PL-mount lenses and both feature a totally new Canon optical design that virtually eliminates focus breathing. As digital cinematography continues to accelerate for theatrical motion pictures, TV movies, episodic dramas, commercials, and other forms of digital high-resolution production, professionals will require the very best in performance and image quality. By already performing in accordance with emerging 4K production image format standards, both of the new Canon PL-mount cine zoom lenses inherently ensure the very highest performance in contemporary 2K and HD digital motion imaging.

    “Both the Canon FK14.5-60 wide-angle cine zoom lens and the FK30-300 telephoto cine zoom lens are engineered to meet the most demanding overall imaging requirements of the latest large-format single-sensor digital cinematography cameras, and the creative requirements of the most discerning cinematographers, producers, and directors. Canon’s new wide-angle FK14.5-60 and telephoto FK30-300 PL-mount lenses will be on display at the 2011 NAB Show along with many other Canon HD lenses and advanced imaging products in booth # C-4325 in the Central Hall of the Las Vegas Convention Center, April 11-14.

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