Canon Patents

Patent: CN-E 35-260mm f/2.8 Soft Focus Lens

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Canon has published a patent for a new zoom cinema lens with a soft focus mechanism. The lens is for the Super 35 image sensor size.

Patent Publication No. 2014-235203 (Google Translated)

  • Published 2014.12.15
  • Filing date 2013.5.31

Example 3

  • Zoom ratio 7.50
  • The focal length f = 34.00-68.00-102.00-136.00-254.99mm
  • Fno. 2.70
  • Half angle ω = 24.58-12.88-8.67-6.52-3.49 °
  • Image height Y = 15.55mm
  • Overall length of the lens 441.54mm
  • BF 51.02mm

Canon patent

  • 4-group zoom of positive and negative negative-positive
  • Spherical aberration adjustment group (soft focus)
  • Not shift the focus position can be switched to soft focus

Source: [EG]

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