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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
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