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Canon Patent For EF 50mm f/1.4 Lens

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Canon filed a new patent in Japan. The new patent describes the EF 50mm f/1.4 prime lens designed for Canon DSLRs with full-frame image sensors.

From the patent application we can say the EF 50mm f/1.4 lens will have 10 elements in six groups. See the patent details below.

Current EF 50mm f/1.4 USM lens was released in 2003 and selling at a price around $350.


Canon EF 50mm f/1.4 Lens Patent

  • 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)

Canon’s EF 50mm f/1.4 USM lens is a standard length lens featuring superb quality and portability. Its f/1.4 maximum aperture makes it very effective in low light situations and able to provide shallow depth of field focus.

via Egami