28-200mm F3.4-5.6 for 35mm full-frame mirrorless cameras from SIGMA

SIGMA filed a patent of various 28-200mm zoom lenses for 35mm full-frame mirrorless cameras.

【公開番号】特開2020-204684(P2020-204684A) click here
【公開日】令和2年12月24日(2020.12.24)
【発明の名称】ズームレンズ

Embdiment 1
Zoom ratio: 7.14
Focal length: 27.99 71.70 199.93 mm
F number: 3.37 4.67 5.60
Angle of view: 78.26 32.06 11.77
Image height: 21.63 21.63 21.63 mm
Lens length: 144.99 161.09 220.98 mm

DG DN standard zoom lenses from SIGMA

SIGMA filed a patent for standard zoom lenses for 35mm full-frame mirrorless cameras.

【公開番号】特開2020-197597(P2020-197597A) click here
【公開日】令和2年12月10日(2020.12.10)
【発明の名称】ズームレンズ

Embodiment 1: 28-70mm F2.8
Zoom ratio: 2.50
Focal length: 28.95 45.80 72.45 mm
F number: 2.93 2.91 2.92
Angle of view: 75.04 49.23 31.7
Image height: 21.63 21.63 21.63 mm
Lens length: 134.00 140.25 154.38 mm


Embodiment 2: 28-100mm F4
Zoom ratio: 3.50
Focal length: 28.95 54.22 101.44 mm
F number: 2.84 3.41 4.17
Angle of view: 75.13 41.46 23.0
Image height: 21.63 21.63 21.63
Lens length: 128.00 149.19 175.91 mm


Embodiment 3: 24-100mm F4
Zoom ration: 4.09
Focal length: 24.82 50.22 101.44 mm
F number: 4.14 4.12 4.13
Angle of view: 84.93 44.15 23.0
Image height: 21.63 21.63 21.63 mm
Lens length: 128.00 155.38 194.18 mm


Embodiment 4: 20-80mm F4
Zoom ratio: 3.97
Focal length: 20.70 41.23 82.11 mm
F number: 4.14 4.13 4.14
Angle of view: 98.46 53.32 28.2
Image height: 21.63 21.63 21.63 mm
Lens length: 127.11 153.18 194.37 mm


Embodiment 5: 28-70mm F2.8
Zoom ratio: 2.50
Focal length: 28.95 45.80 72.45 mm
F number: 2.92 2.91 2.92
Angle of view: 74.70 48.97 31.7
Image height: 21.63 21.63 21.63 mm
Lens length: 134.00 144.45 159.46 mm


Embodiment 6: 24-100mm F4
Zoom ratio: 4.09
Focal length: 24.82 50.22 101.44 mm
F number: 4.13 4.14 4.14
Angle of view: 86.29 44.88 23.0
Image height: 21.63 21.63 21.63 mm
Lens length: 128.00 161.12 208.29 mm

RF cinema lens 18-55mm F2

CANON filed a patent of 18 - 55 mm f/2 cinema lenses for mirrorless cameras.

Embodiment 1: CN-RF18-55mm F2 (T2.2?)
Zoom ratio: 2.97
Focal length; 18.51 34.71 55.00 mm
F number: 2.06 2.06 2.06
Half angle of view: 37.10 21.97 14.28
Image height: 14.00 14.00 14.00 mm
Lens length: 250.01 250.01 250.01 mm
Back focus: 12.95 12.95 12.95 mm