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Does this Canon patent for a 15-43mm f/2-4 lens for APS-C sensors refer to the Powershot G1 X Mark III?

Very interesting patent for 15-43mm f/2-4 lens for APS-C sensors that may point to the upcoming Canon Powershot G1 X Mark III camera, rumored to have an APS-C sensor.

  • Zoom ratio: 2.74
  • Focal length: 15.65 29.18 42.90
  • F No.: 2.06 2.99 4.00
  • Half angle: 41.12 25.09 17.66
  • Image height: 13.66 13.66 13.66
  • Back focus: 8.52 8.01 7.20

Patent literature is hard to grasp. Any help is welcome.

In a zoom lens from which an interval of a lens group which comprises the 1st lens group of negative refracting power, the 2nd lens group of positive refracting power, the 3rd lens group of positive refracting power, the 4th lens group of negative refracting power, and the 5th lens group of positive refracting power, and is adjacent to on the occasion of zooming arranged in order from the object side to the image side changes, between said 2nd lens group and the 3rd lens group, have an aperture diaphragm and said 4th lens group moves on the occasion of focusing — said 4th lens group — most — a curvature radius of a lens surface on the object side — a time of setting a curvature radius of a lens surface on the image side to R4b most of R4a and said 4th lens group, 0.2<(R4b+R4a)/(R4b-R4a)<3.0 A zoom lens satisfying a becoming conditional expression.

[via Hi Lows Note]

  • Narren Rot

    It might as well be a lens for the EOS M, or both. Either way a good news.

    • CW Steve

      you’re right. That it could be for the G1 X Mark III was suggested on the Japanese page that spotted the patent

      • Joey

        If the lens isn’t 24-120mm, it better have a much faster lens.

    • Rick

      a 15-45 f/2-4 would be a nice M lens!

      the BF is a little close for the M however it’s still doable. the BF for the 18-150 and 11-22 is certainly well under the 18mm of the registration distance.

  • Stefanie Daniella

    thx for sharing … here are my number crunching guesstimates … according to (web) available info (provided above by your CW rumour post)

    PatentSpecs: *deduced*

    Canon PowerShot G1X MarkIII
    23.8-65.3mm f3.1-6.1 ff.equiv
    Wide-Aspect 1.73:1 Ratio Sensor (fits 16:9 = 1.777 uhd & 1.893 dci)

    6468 x 3732 = 24,138,576 ■ 24.14 mp
    23.665mm x 13.66mm (Aspect Ratio: 1.73:1) ■ APSC-WideAspect
    Horizontal Crop: 1.52x ■ APSC
    Pixel: 3.66 um ■

  • snappur

    The description can only be characterized as an awkward translation from the original language (Japanese?), and may even be a machine-generated translation. The technical content, however, is probably accurate.

  • Joey

    Kind f disappointing for a camera 3.5 years in the making and such a short focal length.

    Better route the Sony A6000 with kit lens?

    • Rick

      the kit lens is a piece of trash.

      • Joey

        Better than the G1X II and appears it will surpass the G1X III.

        Or by “trash” are you referring to the poor sensor in the G1X II?

        • CG462

          You would take 3.5-5.6 lens over 2-4? The Sony has a bit more reach but I think this is a much more attractive lens.

          • Joey

            But at the cost and bulk of the camera…. Don’t see much demand for it.

            Hope Canon doesn’t pull another Canonitis on us…

        • Rick

          comprehension and reading is hard?

          “kit lens” didn’t give it away to you?

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