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Patent: Soft Focus Lens Designs, Various Focal Lengths

By Canon Rumors | June 21, 2018

Patent: Soft Focus Lens Designs, Various Focal Lengths

Canon has filed a patent spotted by Canon News for a variety of soft focus lenses. The most interesting of the bunch is a 70-200 f/4 full frame lens with a backfocus of 25mm, meaning it’s not an EF mount lens.

35mm f/1.8 full frame EF Canon mount

  • Focal Length 33.75
  • F-Number 1.72
  • Image Height 21.64
  • Total Lens Length 132.93
  • BF 39.14

58mm f/1.4 full frame EF Canon mount

  • Focal Length 57.57
  • F-Number 1.43
  • Image Height 21.64
  • Total Lens Length 160.04
  • BF 40.43

105mm f/2.0 full frame EF Canon mount

  • Focal 103.2
  • F-Number 2.17
  • Image Height 21.64
  • Total Lens Length 123.79
  • BF 42.2

70-200 f/4 full frame BF of 25mm (not EF mount)

  • Focal 72.21 – 194.06
  • F-Number 4.00
  • Image Height: 21.64
  • BF 25.98
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