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Canon Patent For 35mm f/1.4, 85mm f/1.2 and 70-200mm f/2.8 Lenses for Full Frame Cameras

Canon Patent For 35mm F/1.4, 85mm F/1.2 And 70-200mm F/2.8 Lenses For Full Frame Cameras

Hi Lows Note spotted a Canon patent application (2019-45631A) describing optical formulas for a 35mm f/1.4 and 85mm f/1.2 for full frame DSLRs, and for a 70-200mm f/2.8 for full frame mirrorless cameras (the EOS R system).

Focal length: 34.31 mm
F number: 1.45
Angle of view: 32.24
Image height: 21.64 mm
Lens length: 139.98 mm
Back focus: 39.01 mm

Focal length: 85.00 mm
F number: 1.24
Angle of view: 14.28
Image height: 21.64 mm
Lens length: 123.50 mm
Back focus: 39.70 mm

Zoom ratio: 2.71
Focal length: 72.00 ~ 134.99 ~ 194.94 mm
F number: 2.91 ~ 2.91 ~ 2.98
Angle of view: 16.73 ~ 9.11 ~ 6.33
Image height: 21.64 mm
Lens length: 172.73 ~ 219.96 ~ 231.71 mm
Back focus: 14.37 ~ 18.40 ~ 28.12 mm

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