Canon files a patent for a 600mm f/5.6 lens

By PR admin | Published: November 22, 2010
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Canon's patent JPO 2010-145832 is for a 600mm f/5.6 lens:

canon 600mm f5.6 lens patent Canon files a patent for a 600mm f/5.6 lens

600mm f/5.6 lens patent details:

  • Focal distance 582.48
  • F number 5.85
  • Field angle 2.13
  • Image height 21.64
  • Whole-length-of-the-lens 346.68

Canon also filed a patent for a 24-105/3.5-5.6 zoom lens:

Canon patent 24 105mm 3.5 5.6 lens Canon files a patent for a 600mm f/5.6 lens

  • Patent publication: 2010-237455
  • Patent released: 10/21/ 2010
  • Patent filed: 03/31/2009
  • Focal length f: 24.90 - 102.02mm
  • Aperture Fno: 3.62 - 5.82
  • Angle of view: 81.96 - 23.94 °
  • Image Ccrcle: 43.28mm
  • Total lens length: 119.84 - 151.84mn
  • One aspherical surface

Another Canon patent is for a sensor that can capture light with the help of micro lenses (Leica uses this technology in the M9, maybe Canon is preparing for their mirrorless camera):

canon sensor patent Canon files a patent for a 600mm f/5.6 lens

  • Patent publication: 2010-243682
  • Patent released: 10/28/2010
  • Patent filed: 04/03/2009

Related posts:

  1. Canon files a patent for a new 24-70mm F2.8L II USM lens
  2. Canon EF-S 15-105mm f/3.5-5.6 IS USM lens patent
  3. Pentax files a patent for a DA 12-35mm f/3.5-4.5 AL WR SDM lens
  4. Canon patent for EF 28-70mm F2.8 USM lens
  5. Pentax files a patent for a DA*25-350mm F3.3-5.6ED [IF] SDM lens

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6 Comments

  1. astrophotographer
    Posted November 23, 2010 at 12:59 pm | Permalink

    It should be noted the 600mm has diffractive elements. So it’s a ‘DO’ lens.

  2. Richard
    Posted November 23, 2010 at 11:57 pm | Permalink

    I have to wonder just how much money are they saving by making it an f5.6 instead of an f4?

    • James
      Posted November 24, 2010 at 10:43 am | Permalink

      > I have to wonder just how much money are they saving by making it an f5.6 instead of an f4?

      I wonder how much money they are saving by making it a 582mm f/5.85 instead of a 600mm f/5.6?

      It’s common practice for lens manufactures to deliver below published specifications, but that doesn’t justify the practice. Why don’t they come clean and call it a 580mm f/5.9?

    • Abaddon8k
      Posted November 25, 2010 at 2:02 pm | Permalink

      Nikon 600mm F/5.6 AI-S = 2,700 g
      Nikon 600mm f/4G ED VR = 5,060 g

      And From what I understand, that f/4 VR lens is considered lightweight in comparison to the previous gen. So yeah, making it f/5.6 instead of f/4 is a big deal. In this case, approximately 50% weight, or around 6 lbs!!!!!

      • DolphLundgren
        Posted November 26, 2010 at 5:36 am | Permalink

        Nikon 400mm f/2.8G VR = 4,620 g
        Canon EF 400mm f/2.8 IS II = 3,850g

        Here; these are both lenses of the latest generation and as we can see, it’s not all in max aperture; Canon’s lens is 20% lighter while still offering pretty equal performance. Same goes for 200/2 and 300/2.8 lenses.

  3. Milan Kolarovic
    Posted November 24, 2010 at 7:26 am | Permalink

    ^ I’d wonder how much weight & size they have saved by making it F5.6 instead of F4.0 ;)