SIGMA 24-70mm F2.8, 28-70mm F2.8, 28-84mm F2.8 DG

SIGMA filed a patent discussing 24-70mm F2.8, 28-70mm F2.8 and 28-84mm F2.8 for 35mm full-frame mirrorless cameras.

【公開番号】特開2022-67732(P2022-67732A)　click here
【公開日】令和4年5月9日(2022.5.9)
【発明の名称】大口径ズームレンズ

Embodiment 1
Zoom ratio: 2.75
Focal length (mm): 24.72 39.76 67.98
F number: 2.92 2.92 2.92
Angle of view (degree): 85.24 56.96 34.33
Image height (mm): 21.63 21.63 21.63
BF (mm): 17.6206 17.6036 17.5749
Lens length (mm): 135.00 145.60 171.09


Embodiment 2
Zoom ratio: 2.75
Focal length (mm): 24.72 39.88 68.02
F number: 2.92 2.92 2.92
Angle of view (degree): 85.13 56.00 34.31
Image height (mm): 21.63 21.63 21.63
BF (mm): 17.6251 17.5782 17.5747
Lens length (mm): 135.00 147.22 170.64


Embodiment 3
Zoom ratio: 2.35
Focal length (mm): 28.81 40.01 67.69
F number: 2.92 2.92 2.92
Angle of view (degree): 75.92 56.06 33.85
Image height (mm): 21.63 21.63 21.63
BF (mm): 19.6292 19.5884 19.6020
Lens length (mm): 120.04 126.08 142.66


Embodiment 4
Zoom ratio: 2.90
Focal length (mm): 28.79 49.98 83.51
F number: 2.92 2.92 2.92
Angle of view (degree): 75.61 45.42 27.77
Image height (mm): 21.63 21.63 21.63
BF (mm): 17.6146 17.5433 17.5817
Lens length (mm): 135.02 146.97 164.94


Embodiment 5
Zoom ratio: 2.35
Focal length (mm): 28.79 40.00 67.69
F number: 2.92 2.92 2.92
Angle of view (degree): 75.80 55.88 33.85
Image height (mm): 21.63 21.63 21.63
BF (mm): 19.6023 19.5788 19.5794
Lens length (mm): 120.00 126.94 144.45


Embodiment 6
Zoom ratio: 2.90
Focal length (mm): 28.79 50.39 83.39
F number: 2.92 2.92 2.92
Angle of view (degree): 75.90 44.79 27.76
Image height (mm): 21.63 21.63 21.63
BF (mm): 17.5983 17.5658 17.5615
Lens length (mm): 135.01 147.86 164.44