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

Canon EF-M 9-18mm lens patentCanon has just file a new patent for EF-M 9-18mm F3.5-4.5 STM lens. This is an ultra wide angle lens for Canon mirrorless cameras.

There are a lot of EOS M patents happening this year. It seems at least one higher end EOS M camera will be announced and released in 2016.

Detail translated by Google:

  • Patent Publication No. 2016-54371
    • Published 2016.4.14
    • Filing date 2014.9.3
  • Example
    • Zoom ratio 1.90
    • Focal length 9.22 14.05 17.50
    • F-number 3.39 4.04 4.63
    • Half angle (in 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
    • Upon correction of the distortion, providing a constraint on stretching amount at each image height
    • Properly set the curve shape of the distortion aberration

Source: EGAMI

Read More Canon Lens Patent


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