RF 18mm F1.8, 20mm F1.4, 21mm F1.8, 24mm F1.8, 28mm F1.8

CANON filed a patent describing wide-angle prime lenses for 35mm full-frame mirrorless cameras.

【公開番号】特開2021-193406(P2021-193406A)　click here
【公開日】令和3年12月23日(2021.12.23)
【発明の名称】光学系およびそれを有する撮像装置

Embodiment 1
Focal length (mm): 18.54
F number: 1.85
Half angle of view (degree): 49.41
Image height (mm): 21.64
Lens length (mm): 107.66
Back focus (mm): 14.09


Embodiment 2
Focal length (mm): 23.83
F number: 1.85
Half angle of view (degree): 42.24
Image height (mm): 21.64
Lens length (mm): 104.66
Back focus (mm): 15.90


Embodiment 3
Focal length (mm): 24.65
F number: 1.85
Half angle of view (degree): 41.27
Image height (mm): 21.64
Lens length (mm): 102.66
Back focus (mm): 14.91


Embodiment 4
Focal length (mm): 20.48
F number: 1.44
Half angle of view (degree): 46.56
Image height (mm): 21.64
Lens length (mm): 124.66
Back focus (mm): 13.16


Embodiment 5
Focal length (mm): 21.36
F number: 1.85
Half angle of view (degree): 45.37
Image height (mm): 21.64
Lens length (mm): 105.66
Back focus (mm): 14.88


Embodiment 6
Focal length (mm): 21.36
F number: 1.85
Half angle of view (degree): 45.37
Image height (mm): 21.64
Lens length (mm): 104.66
Back focus (mm): 13.88


Embodiment 7
Focal length (mm): 21.36
F number: 1.85
Half angle of view (degree): 45.37
Image height (mm): 21.64
Lens length (mm): 104.66
Back focus (mm): 13.82


Embodiment 8
Focal length (mm): 28.08
F number: 1.85
Half angle of view (degree): 37.61
Image height (mm): 21.64
Lens length (mm): 92.66
Back focus (mm): 12.16

Zoom lenses for APS-C DSLR from RICOH (PENTAX)

RICOH filed a patent describing zoom lenses for a DSLR with APS-C sensor.

【公開番号】特開2021-192088(P2021-192088A) click here
【公開日】令和3年12月16日(2021.12.16)
【発明の名称】ズームレンズ、レンズ鏡筒、交換レンズ及び撮像装置

Embodiment 1
f=16.5～28.0～48.6、F=2.9～2.9～2.9、w=42.0～27.0～16.1、Ya=14.24


Embodiment 2
f=16.5～28.5～48.6、F=2.9～2.9～2.9、w=42.0～26.8～16.1、Ya=14.24


Embodiment 3
f=16.5～28.2～48.6、F=2.9～2.9～2.9、w=41.9～26.9～16.1、Ya=14.24


Embodiment 4
f=16.4～28.2～48.5、F=2.9～2.9～2.9、w=42.0～27.1～16.1、Ya=14.24


Embodiment 5
f=16.5～28.1～48.5、F=2.9～2.9～2.9、w=42.0～26.7～16.1、Ya=14.24


Embodiment 6
f=16.4～28.2～48.6、F=2.9～2.9～2.9、w=42.0～26.7～16.1、Ya=14.24


Embodiment 7
f=16.5～28.3～48.5、F=2.9～2.9～2.9、w=41.9～27.0～16.4、Ya=14.24


Embodiment 8
f=15.5～26.0～43.7、F=2.9～2.9～2.9、w=44.3～28.4～17.6、Ya=14.24


Embodiment 9
f=18.5～43.5～101.9、F=2.9～2.9～2.9、w=39.0～17.8～7.7、Ya=14.24


Embodiment 10
f=16.45～28.25～48.52、F=2.9～2.9～2.9、w=42.0～26.3～16.0、Ya=14.24

Zoom lenses for a m4/3 sensor from CANON

CANON filed a patent describing zoom lenses for m4/3 sensor mirrorless cameras.

【公開番号】特開2021-183997(P2021-183997A) click here
【公開日】令和3年12月2日(2021.12.2)
【発明の名称】ズームレンズおよび撮像装置

Embodiment 1
Zoom ratio: 9.70
Focal length (mm): 17.51 87.85 169.87
F number: 2.27 4.40 4.63
Half angle of view (degree): 31.70 7.02 3.64
Image height (mm): 10.82 10.82 10.82
Lens length (mm): 129.45 129.45 129.45
Back focus (mm): 21.20 11.01 6.13


Embodiment 2
Zoom ratio: 19.70
Focal length (mm): 14.26 117.92 280.89
F number: 2.88 5.38 5.77
Half angle of view (degree): 37.19 5.24 2.21
Image height (mm): 10.82 10.82 10.82
Lens length (mm): 181.14 181.14 181.14
Back focus (mm): 19.35 10.59 6.46


Embodiment 3
Zoom ratio: 9.70
Focal length (mm): 14.43 75.84 139.93
F number: 1.85 4.80 5.15
Half angle of view (degree): 36.86 8.12 4.42
Image height (mm): 10.82 10.82 10.82
Lens length (mm): 156.33 156.33 156.33
Back focus (mm): 19.33 8.31 6.13


Embodiment 4
Zoom ratio: 14.55
Focal length (mm): 8.77 65.57 127.58
F number: 2.88 4.90 4.63
Half angle of view (degree): 36.33 6.45 3.32
Image height (mm): 6.45 7.41 7.41
Lens length (mm): 124.59 124.59 124.59
Back focus (mm): 18.01 6.17 6.17


Embodiment 5
Zoom ratio: 4.60
Focal length (mm): 17.51 53.31 80.54
F number: 2.27 3.00 3.38
Half angle of view (degree): 31.71 11.47 7.65
Image height (mm): 10.82 10.82 10.82
Lens length (mm): 129.35 129.35 129.35
Back focus (mm): 24.93 10.99 6.14