skip to Main Content

Canon Patent For 600mm f/4 Lens

Canon Patent

Egami (translated) spotted a patent filed by Canon for a new 600mm f/4 lens. Egami suggests the lens will be ready for Tokyo Olympic Games in 2020 and the Rio de Janeiro Olympic Games in 2016.

  • Patent Publication No. 2014-26210
    • Publication date 2014.2.6
    • Filing date 2012.7.30
  • Example 1
    • Focal length f = 588mm
    • Fno. 4.12
    • Angle of view 2ω = 4.22 °
    • BF 56.0mm
    • Total lens length 374.7mm
    • Inner focus
  • Example 5
    • Focal length f = 588mm
    • Fno. 4.12
    • Angle of view 2ω = 4.22 °
    • BF 55.0mm
    • Total lens length 343.5mm
    • Inner focus
    • Diffraction optical element
  • Effect of the glass material
    • Fluorite (Fluorite)
      • In the long lens fluorite + total length, correction of chromatic aberration is easy
      • In short lens fluorite + total length, correction of chromatic aberration is difficult
    • Diffractive optical element (DOE)
      • Diffractive optical element can be corrected if the chromatic aberration
      • Flare caused by light diffraction
Back To Top

Notice

This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. If you want to know more or withdraw your consent to all or some of the cookies, please refer to the cookie policy.
By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to the use of cookies.