Canon patent for EF 15-105mm f/2.8-5.6 lens

Canon filed a patent for an EF 15-105mm f/2.8-5.6 lens.

• Patent Publication No. 2015-118141
  • Published 2015.6.25
  • Filing date 2013.12.17
• Example
  

  embodiment

  Example	Zoom ratio	Focal length	Fno.	Half angle	Image height	Overall length of the lens	BF
  1	4.12	24.75 52.09 101.92	3.60 4.81 5.83	41.16 22.56 11.98	21.64	146.25 166.83 195.25	38.99 58.34 73.70
  2	6.81	15.40 22.95 104.92	2.88 3.39 5.60	41.57 30.76 7.42	13.66	149.46 154.42 222.88	38.13 46.49 77.97

• Canon patents
  • Positive and negative positive and negative positive and negative positive 7-group zoom
  • Inner focus (fourth group)