Canon patent application: Soft focus lenses

In this Canon patent application, Canon appears to be patenting a bunch of soft focus lens designs. In this patent, there is a variety of different controllable soft focus designs, including one that would be esoteric for mirrorless full frame.

The embodiments;

Embodiment 1

58mm 1.4 full frame EF Canon mount

Focal Length 57.57
F-Number 1.43
Image Height 21.64
Total Lens Length 160.04
BF 40.43

Embodiment 2

35mm 1.8 full frame EF Canon mount

Focal Length 33.75
F-Number 1.72
Image Height 21.64
Total Lens Length 132.93
BF 39.14

Embodiment 3

105mm 2.0 full frame EF Canon mount

Focal 103.2
F-Number 2.17
Image Height 21.64
Total Lens Length 123.79
BF 42.2

Embodiment 4

70-200 F4 full frame BF of 25mm (not EF mount)

Focal 72.21 - 194.06
F-Number 4.00
Image Height: 21.64
BF 25.98
 

US Patent Application 20180172964