RF 20mm and 23mm F1.8 from CANON

CANON filed a patent discussing optical designs of 20mm and 23mm F1.8 for 35mm full-frame mirrorless cameras.

【公開番号】特開2021-71624(P2021-71624A) click here
【公開日】令和3年5月6日(2021.5.6)
【発明の名称】光学系およびそれを有する撮像装置

Embodiment 1: RF 23mm F1.8
Focal length 23.40 mm
F number 1.85
Half angle of view (degree) 42.76
Image height 21.64 mm
Lens length 89.32 mm
BF 11.72 mm


Embodiment 2: RF 23mm F1.8
Focal length 23.28 mm
F number 1.85
Half angle of view (degree) 42.90
Image height 21.64 mm
Lens length 93.32 mm
BF 12.72 mm


Embodiment 3: RF 20mm F1.8
Focal length 20.60 mm
F number 1.85
Half angle of view (degree) 46.40
Image height 21.64mm
Lens length 88.73 mm
BF 11.72 mm