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

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]