Canon Patent for EF-M 9-17mm f/3.5-5 mirrorless lens

Canon has filed a patent in Japan. It is the EF-M 9-17mm f/3.5-5 lens designed for company’s mirrorless interchangeable lens system.

From the patent application we can see that Canon is working on a new super wide-angle zoom lens with a maximum aperture range between f/3.5-5. If becomes available, it will be aimed at Canon EOS-M mirrorless cameras.

Canon EF-M 9-17mm f/3.5-5 patent describes a lens with a 35mm equivalent of 14.5-27mm and a maximum aperture of f/3.5-5. 

Canon EF-M 9-17mm f/3.5-5 lens patent


A newly-discovered patent is describing a lens for an EF-M mirrorless cameras which features a focal length range from 9mm to 17mm. From the patent application we can say the mirrorless model offers a 1.79x optical zoom and an image height of about 11.79mm.

Patent Publication No. 2016-85259

  • Published 2016.5.19
  • Filing date 2014.10.23
  • Example
  • Zoom ratio 1.79
  • Focal length 9.27 13.32 16.58
  • F-number 3.60 4.38 5.11
  • Angle of view 51.83 45.17 38.94
  • Image height 11.79 13.40 13.40
  • Overall length of the lens 85.22 79.65 81.94
  • BF 14.99 16.82 15.41

Canon is working hard to build their mirrorless line-up. As you might guess the EF-M 9-17mm f/3.5-5 wide-angle zoom lens is designed for EOS M mirrorless cameras with APS-C-sized image sensors. We’ll see which of these products turn into mass production soon.

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