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Canon Patent for EF-M 55mm f/3.5 Macro Lens

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Canon has a new patent application for a new macro lens. The new patent describes the EF-M 55mm f/3.5 lens designed for Canon mirrorless cameras with APS-c sized  sensors.

The Canon EF-M 55mm f/3.5 macro lens comes with a maximum aperture of f/3.5. Canon is working seriously on the EOS M system, see the similar optical formula deisgned for Canon full-frame mirrorless system.

Patent details of the EF-M 55mm f/3.5 macro lens for a Canon APS-C sensor mirrorless camera can be seen below.

Canon EF-M 55mm f/3.5 Macro Lens Patent


  • Patent Publication No. 2015-215391
    • Published 2015.12.3
    • Filing date 2014.5.8
  • Example 1
    • Focal length 53.73
    • F-number 3.50
    • Half angle (in degrees) 14.26
    • Image height 13.66
    • Overall length of the lens 76.39
    • BF 17.69

via Egami