Sigma Patents: 24mm f/1.8, 28mm f/2, 35mm f/2 & 50mm f/2 Lenses

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Sigma filed a patent discussing 24mm f/1.8, 28mm f/2, 35mm f/2 & 50mm f/2 lenses for Sony E-mount full-frame mirrorless cameras. Take a look at the patent details below:

【Publication number】 JP 2021-165807(P2021-165807A)
【Release date】 October 14, 2021
【Patent application title】 Imaging optical system

Embodiment 1
Focal length (mm): 33.81
F number: 2.07
Angle of view (degree): 66.94
Image height (mm): 21.63
Lens length (mm): 79.15
Back focus (mm): 17.8978

Embodiment 2
Back focus (mm): 35.99
F number: 2.07
Angle of view (degree): 63.53
Image height (mm): 21.63
Lens length (mm): 79.15
Back focus (mm): 17.8981

Embodiment 3
Back focus (mm): 50.00
F number: 2.08
Angle of view (degree): 46.01
Image height (mm): 21.63
Lens length (mm): 84.36
Back focus (mm): 17.8985

Embodiment 4
Back focus (mm): 28.00
F number: 2.05
Angle of view (degree): 78.03
Image height (mm): 21.63
Lens length (mm): 74.15
Back focus (mm): 24.4448

Embodiment 5
Back focus (mm): 24.00
F number: 1.86
Angle of view (degree): 63.73
Image height (mm): 14.20
Lens length (mm): 64.15
Back focus (mm): 17.8982

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Via: hi-lows-note