Reflex lenses with IS from CANON

CANON filed a patent discussing optical designs of reflex lens with IS (BIS in this application) for 35mm full-frame sensor cameras, not sure for DSLR and/or mirrorless.

【公開番号】特開2021-76670(P2021-76670A) click here
【公開日】令和3年5月20日(2021.5.20)
【発明の名称】光学系および光学機器

Embodiment 1: 1200mm F10
Focal length: 1199.87 mm
F number: 10.58
Half angle of view (degree): 1.03
Image height: 21.64 mm
Lens length: 275.87 mm
BF 123.44 mm


Embodiment 2: 1200mm F10
Focal length: 1199.87 mm
F number: 10.50
Half angle of view (degree): 1.03
Image height: 21.64 mm
Lens length: 300.46 mm
BF 79.08 mm


Embodiment 3: 800mm F5
Focal length: 799.26 mm
F number: 5.11
Half angle of view (degree): 1.55
Image height: 21.64
Lens length: 330.36 mm
BF 160.57 mm


Embodiment 4 400mm F3.5
Focal length: 399.12 mm
F number: 3.57
Half angle of view (degree): 3.10
Image height: 21.64 mm
Lens length: 206.85 mm
BF 59.29 mm


Embodiment 5: 2000mm F15
Focal length: 1999.72 mm
F number: 15.00
Half angle of view (degree): 0.62
Image height: 21.64
Lens length: 331.40 mm
BF 96.81 mm


Embodiment 6: 1200mm F10
Focal length: 1199.56 mm
F number: 10.58
Half angle of view (degree): 1.03
Image height: 21.64 mm
Lens length: 277.75 mm
BF 124.47 mm


Embodiment 7: 1200mm F7.6
Focal length: 1199.64 mm
F number: 7.64
Half angle of view (degree): 1.03
Image height: 21.64 mm
Lens length: 351.51 mm
BF 80.25 mm