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Canon Patent Application: Canon EF-M kit lenses
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Canon Patent Application: Canon EF-M kit lenses

This patent application is for a Canon EF-M 16-45 (IS STM most likely) with a variable aperture of 3.5-5.6, as well as a few other embodiments.  Canon needs to continue to work on lenses for the EF-M, including a better kit lens with less copy variation.  This patent application hopes to bring good optical performance with less vignetting in the periphery regions.

Focal length       15.51 28.00 43.48
F-number            3.64  4.94  6.50
angle of view      41.38 26.01 17.44 (deg.)
Image height       13.66 13.66 13.66
length of the zoom 75.09 71.52 75.03 lens
BF                 11.49 17.56 25.24

Focal length       16.00 40.49 47.04
F-number            3.50  5.30  5.82
angle of view      37.77 18.64 16.19 (deg.)
Image height       12.40 13.66 13.66
length of the zoom 73.45 70.14 73.25
lens BF            10.94 22.37 26.27

Focal length       15.51 28.00 43.48
F-number            3.64  4.94  6.50
angle of view      41.38 26.01 17.44 (deg.)
Image height       13.66 13.66 13.66
length of the zoom 75.09 71.52 75.03
lens BF            11.49 17.56 25.24

Focal length        18.51  49.01 130.98
F-number             3.59   4.82   5.88
angle of view       36.43  15.57   5.95 (deg.)
Image height        13.66  13.66  13.66
length of the Zoom 104.31 122.72 148.15
lens BF             10.99  24.52  36.57

US Patent Application 20190004277 

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