We just wrote about a replacement for the EF 16-35 f/2.8L II this week, and now a patent showing an upgraded optical formula has appeared.

Patent Publication No. 2014-206674

  • Published 2014.10.30
  • Filing date 2013.4.15

Example 1

  • Zoom ratio 2.06
  • Focal length f = 16.49-23.74-33.94mm
  • Fno. 2.91
  • Half angle of view ω = 52.69-42.35-32.51 °
  • BF 38.74-48.38-63.65mm

Source: [EG]

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