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Canon Patent Application: EF-M 18-55 with variable field curvature
This patent application describes a lens that has variable field curvature and a reduction of spherical aberrations. This is an APS-C mirrorless lens, as indicated by the image height of 13.66mm and the back focus of 11.55mm.
The full lens particulars are;
Focal distance 18.58 53.49
F number 3.56 5.87
Field angle 36.32 14.32
Image height 13.66 13.66
BF 11.55 11.55
Focal distance 18.54 53.37
F number 3.5 5 5.86
Field angle 36.39 14.36
Image height 13.66 13.66
BF 10.14 10.14
Japan Patent Application 2018159876
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