RF 28-70mm F2.8 and 28-86mm F2.8-5.6

CANON filed a patent discussing 28-70mm F2.8 and 28-86mm F2.8-5.6 for 35mm full-frame mirrorless cameras.

【公開番号】特開2021-156963(P2021-156963A) click here
【公開日】令和3年10月7日(2021.10.7)
【発明の名称】ズームレンズおよび撮像装置

Embodiment 1
Zoom ratio: 2.35
Focal length (mm): 28.84 36.81 67.90
F number: 2.91 2.91 2.91
Half angle of view (degree): 32.68 29.23 17.67
Image height (mm): 18.50 20.60 21.64
Lens length (mm): 117.09 109.31 101.58
Back focus (mm): 9.99 13.47 21.59


Embodiment 2
Zoom ratio: 2.35
Focal length (mm): 28.84 37.17 67.90
F number: 2.91 2.91 2.91
Half angle of view (degree): 32.65 28.90 17.67
Image height (mm): 21.64 21.64 21.64
Lens length (mm): 132.62 122.81 111.18
Back focus (mm): 21.92 26.79 39.84


Embodiment 3
Zoom ratio: 2.35
Focal length (mm): 28.84 37.76 67.90
F number: 2.91 2.91 2.91
Half angle of view (degree): 32.65 28.52 17.67
Image height (mm): 21.64 21.64 21.64
Lens length (mm): 145.96 132.92 114.12
Back focus (mm): 24.12 30.24 43.27


Embodiment 4
Zoom ratio: 2.35
Focal length (mm): 28.84 38.11 67.90
F number: 2.91 2.91 2.91
Half angle of view (degree): 32.64 27.97 17.59
Image height (mm): 21.64 21.64 21.64
Lens length (mm): 158.97 140.28 124.83
Back focus (mm): 11.36 16.01 33.05


Embodiment 5
Zoom ratio: 2.99
Focal length (mm): 28.84 36.43 86.18
F number: 2.91 3.50 5.60
Half angle of view (degree): 32.64 28.55 14.09
Image height (mm): 21.64 21.64 21.64
Lens length (mm): 156.45 143.53 123.40
Back focus (mm): 7.83 12.26 26.55


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