Yet another Canon patent for an EF-M lens (EOS M system). This time we have an optical formula for an EF-M 9-17mm f/3.5-5 lens. According to the patent literature, f/5 at the wide end was achieved by using high quality glass. The first “L”-grade lens for the EOS M?

It definitely looks like Canon is investing pretty much in the EOS M system, at least if you count all the filed patents. We expect at least one new EOS M model this year, maybe two with one being a full-frame mirrorless camera.

• 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

[via Egami]