Canon announced RF in Japan 17-70mm F3.5-5.6 lens patent

Canon announced RF in Japan 17-70mm F3.5-5.6 lens patent

   Recently, Canon announced RF in Japan 17-70mm F3.5-5.6 lens patent, patent number is 2019-139172. Judging from the exposure patent, this lens is suitable for Canon EOS R series full-frame mirrorless cameras. The following are the patent details of Canon RF 17-70mm F3.5-5.6 lens:

  Patent details 1:

Focal length: 17.40 35.02 68.69 Aperture: 3.57 4.18 5.85 Half angle of view: 51.19 31.71 17.48 Image height: 21.64 21.64 21.64 Length of lens: 149.59 133.68 150.50 Back focal length: 13.43 27.63 57.99 17.10 34.82 72.70 Aperture: 3.57 4.18 5.85 Half angle: 51.68 31.85 16.57 Image height: 21.64 21.64 21.64 Lens length: 151.00 135.57 157.71 Back focal length: 13.13 27.81 63.49

   Patent details 3 :

Focal length: 18.70 37.55 77.50 Aperture: 3.57 4.18 5.85 Half angle: 49.16 29.95 15.60 Image height: 21.64 21.64 21.64 Lens length: 146.50 128.90 147.50 Back focal length: 15.19 27.72 59.84

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