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

According to the Egami Blog, Canon has filed a patent associated with the EF-M 9-18mm f/3.5-4.5 STM.

Patent Details

• Patent Publication No. 2016-54371
• 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