Canon patent for 9-20mm f/4.5-5.6 image-stabilised lens for APS-C DSLRs

Canon patent for a new lens, an ultra-wide angle and image-stabilised 9-20mm f/4.5-5.6 lens. The described optical formula refers to an APS-C sensor.

• Patent Publication No. 2015-31869
  • Published 2015.2.16
  • Filing date 2013.8.5
• Example
  • Zoom ratio 2.07
  • Focal length 9.50 14.52 19.70
  • F-number 4.64 5.21 5.80
  • Half angle (in degrees) 55.17 43.26 34.74
  • Image height 13.66
  • Overall length of the lens 143.95 134.71 134.11
  • BF 38.00 47.58 56.42

[via Egami]