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24mm F1.8, 28mm F2, 35mm F2, and 50mm F2 from SIGMA [Patent]

SIGMA filed a patent discussing 24mm F1.8, 28mm F2, 35mm F2, and 50mm F2 for 35mm full-frame mirrorless cameras.

【公開番号】特開2021-165807(P2021-165807A) click here
【公開日】令和3年10月14日(2021.10.14)
【発明の名称】結像光学系

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
JPA 503165807_i_000003.jpg

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
JPA 503165807_i_000008.jpg

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
JPA 503165807_i_000013.jpg

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
JPA 503165807_i_000018.jpg

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
JPA 503165807_i_000023.jpg
nice!(1) 
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