Canon has just filed a new patent of EF-M 9-18mm f/3.5-4.5 STM Lens. It is a wide angle zoom lens for Canon APS-C mirrorless cameras.
- Patent Publication No. 2015-34892
Published 2015.2.19
Filing date 2013.8.9 - Example 1
Zoom ratio 1.90
The focal length f = 9.22 14.67 17.50mm
Fno. 3.45 4.02 4.63
Half angle ω = 55.92 42.90 37.92 °
Image height Y = 13.63mm
Overall length of the lens 94.76 85.16 91.16mm
BF 13.06 15.35 13.60mm
Negative positive and negative positive 4-group zoom
Inner Focus (third group)
Video support
Source: EG
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