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CANON EF-M 9-18MM lens patent for mirrorless camera

LENS PATENTBefore we began we must know that an ultra wide-angle EF-M 11-22mm f/4-5.6 IS STM lens is already available for the EOS M system. Now Canon filed a latest patent for a 9-18mm f/3.5-4.5 STM, based on a new ultra wide angle optical formula. There is expectation that this latest patent for the STM lens will be the successor of the existing EF-M 11-22 f/4-4.5 IS STM lens.

Patent Details:-

  • 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
  • Upon correction of the distortion, providing a constraint on stretching amount at each image height
  • Properly set the curve shape of the distortion aberration

 

Proceed with us for more information.

 

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