Patent: Canon EF 35mm f/1.4L II

Patent: Canon EF 35mm f/1.4L II

Canon EF 35 f/1.4L II
A new patent for a Canon EF 35m f/1.4L II has shown it’s lovely head. We’ve seen patents previously and have heard various versions of the lens have been in testing for the past few years.

Patent Publication No. 2013-195747

  • Publication date 2013.9.30
  • Filing date 2012.3.21

Example 1

  • Focal length f = 14.17mm
  • Fno. 2.89
  • Half angle ω = 56.78 °
  • Image height 21.64mm
  • The overall length of the lens 133.50mm
  • BF 40.23mm
  • 14 pieces in 11 groups Lens Construction
  • 2 pieces of 2 aspherical surface
  • The effective diameter of the front lens 69.96mm

Example 2

  • Focal length f = 24.50mm
  • Fno. 2.80
  • Half angle ω = 41.45 °
  • Image height 21.64mm
  • The overall length of the lens 92.07mm
  • BF 38.07mm
  • 8 group 9 lenses configuration
  • 2 pieces of 2 aspherical surface
  • The effective diameter of the front lens 34.58mm

Example 3

  • Focal length f = 35.50mm
  • Fno. 1.45
  • Half angle ω = 31.36 °
  • Image height 21.64mm
  • The overall length of the lens 135.01mm
  • BF 38.56mm
  • 11 pieces Lens Construction 9 group
  • One piece of one aspherical surface
  • The effective diameter of the front lens 49.79mm

Also included in this patent are formulas for a 14mm f/2.8 and a 24 f/2.8.

Canon EF 35 f/1.4L $1479 at B&H Photo | Amazon

Source: [EG]

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