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Thursday, April 21, 2016

Canon Patent - EF-M 9-18mm f/3.5-4.5 STM Lens

I have just returned from a rather successful wildlife photo trip to India. Witnessed two tiger kills from beginning to end on a Spotted and Sambar Deer plus Elephants and Monkeys mating, in addition to many new bird species for me. Trying to get back to writing my blog and catching up with the latest photography and NAB 2016 news. It will take me a week or two to get back to speed and precious little time to process the photos because by then, my next tour will be here already. I have a very busy Spring and Summer touring season ahead of me. You can see my works on

Egami discovered another new Canon patent for a EF-M 9-18mm f/3.5-4.5 STM Ultra Wide lens. I expect Canon to announce a new prosumer EOS-M mirrorless camera and more EF-M prime and medium zoom lens later this year.

Patent Publication No. 2016-54371 (Google Translated)

  • Published 2016.4.14
  • Filing date 2014.9.3
  • Zoom ratio 1.90
  • Wide-angle intermediate telephoto
  • Focal length 9.22 14.05 17.50
  • F-number 3.39 4.04 4.63
  • Half angle of view (degrees) 53.07 44.12 37.91
  • Image height 12.27 13.63 13.63
  • Overall length of the lens 89.68 83.60 86.84
  • BF 14.22 15.78 16.00

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