SIGMA 50mm, 58mm, 65mm, 68mm F2 DG DN

SIGMA filed a patent describing 50mm, 58mm, 65mm, 68mm F2 for a 35mm full-frame mirrorless sensor camera.

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【公開番号】特開2021-128263(P2021-128263A) click here
【公開日】令和3年9月2日(2021.9.2)
【発明の名称】大口径光学系

Embodiment 1
Focal length (mm): 63.10 (INF) 57.83 (MOD)
F number: 2.07 2.32
Angle of view (degree): 37.04 31.49
Image height (mm): 21.63 21.63
Lens length (mm): 89.00 89.00
Back focus (mm): 19.3302 19.3302


Embodiment 2
Focal length (mm): 63.10 59.88
F number: 2.06 2.33
Angle of view (degree): 36.99 31.29
Image height (mm): 21.63 21.63
Lens length (mm): 89.00 89.00
Back focus (mm): 22.7814 22.7814


Embodiment 3
Focal length (mm): 51.35 47.43
F number: 2.07 2.33
Angle of view (degree): 45.55 38.15
Image height (mm): 21.63 21.63
Lens length (mm): 83.20 83.20
Back focus (mm): 20.7411 20.7411


Embodiment 4
Focal length (mm): 58.00 55.13
F number: 2.07 2.34
Angle of view (degree): 41.26 34.50
Image height (mm): 21.63 21.63
Lens length (mm): 87.13 87.13
Back focus (mm): 21.9349 21.9349


Embodiment 5
Focal length (mm): 67.90 60.14
F number: 2.25 2.50
Angle of view (degree): 34.57 29.56
Image height (mm): 21.63 21.63
Lens length (mm): 89.00 89.00
Back focus (mm): 18.6900 18.6900


Embodiment 6
Focal length (mm): 51.25 49.23
F number: 2.07 2.40
Angle of view (degree): 45.83 37.41
Image height (mm): 21.63 21.63
Lens length (mm): 83.20 83.20
Back focus (mm): 20.7411 20.7411