Canon Filed a Patent for EF 35mm f/1.4L II Lens

Egami, the Japanese Photography Blog has spotted a Canon Patent for the EF 35mm f/1.4L II lens. The filed patent appears to refer to the successor of the Canon EF 35mm f 1.4L USM which is released in back 1998 and currently priced for $1,479 at Amazon.

This is not the first patent for a 35mm lens in the lineup. Previously there were rumors that Canon was field-testing a EF 35mm f/1.4L II lens. Also included in the patent are formulas for a 14mm f/2.8 and a 24mm f/2.8. Below are the translated text by Google of the patent.

Canon Filed a Patent for EF 35mm f/1.4L II Lens

Canon-ef-35mm-f1.4_lens_patent

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 ? = 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 ? = 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 ? = 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