Canon Patents

Patent: Canon EF 50mm f/1.4

The optical formula for a new EF 50mm f/1.4 has appeared. It looks like the lens has internal focus and an odd negative front element. We haven’t heard anything for a while about a new 50mm f/1.4, but it’s definitely needed.

Patent Publication No. 2015-138121

  • Published 2015.7.30
  • Filing date 2014.1.22

Example 1

  • Focal length 49.10
  • F number 1.45
  • Half angle (in degrees) 23.78
  • Image height 21.64
  • Overall length of the lens 100.16
  • BF 38.10

Canon patents

  • Positive ShiboTadashi
  • Inner focus (part of the first group)

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