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Canon patent for 30mm F2.8 DO lens for full-frame mirrorless cameras

30mm

Another Canon patent for an optical formula that appears to point to a full-frame mirrorless camera, a 30mm F2.8 DO lens. “DO” stays for diffractive optics. I tell you folks, Canon’s full-frame mirrorless camera is coming!

  • Patent Publication No. 2016-102851
    • Published 2016.6.2
    • Filing date 2014.11.27
  • Example
    • Zoom ratio 1.00
    • Focal length 31.35
    • F-number 2.86
    • Angle of view 34.61
    • Image height 21.64
    • Overall length of the lens 85.29
    • BF 29.99
  • Canon patent
    • Positive ShiboTadashi
    • Diffractive optical element (the second group of aperture stop image side)
    • Correct axial chromatic aberration and lateral chromatic aberration of the near-infrared light
  • [0001] The present invention relates to a magnification chromatic aberration correction of the imaging optical system used in a near infrared region from the visible region is suitable especially monitoring optical system.
[via Egami]
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