18-55mm F2.8 for APS-C, 34mm F1.4 for 35mm full-frame and their reducers from CANON

CANON filed a patent containing 18-55mm F2.8 for APS-C, 34mm F1.4 for 35mm full-frame and their reducer lenses.

【公開番号】特開2019-3074(P2019-3074A) click here
【公開日】平成31年1月10日(2019.1.10)
【発明の名称】コンバータレンズ及びそれを有する撮像装置

Specification and lens arrangement of master lens 1 (18-55mm, F2.8)
Zoom ratio: 3.05
Focal length: 17.50 - 53.35 mm
F number: 2.80 - 2.80
Half angle of view: 36.65 - 13.71
Image height: 13.02 - 13.02 mm
Lens length: 148.81 - 172.70 mm
Back focus: 35.51 - 40.31 mm


Specification and lens arrangement of master lens 1 with reducer 1
Focal length: 11.36 mm
F number: 1.82
Half angle of view: 36.67
Image height: 8.46 mm
Lens length: 142.26 mm
Back focus: 2.00 mm


Specification and lens arrangement of master lens 2 (34mm, F1.4)
Focal length: 34.20 mm
F number: 1.45
Half angle of view: 32.32
Image height: 21.64 mm
Lens length: 129.16 mm
Back focus: 39.35 mm


Specification and lens arrangement of master lens 2 with reducer 5
Focal length: 23.92 mm
F number: 1.02
Half angle of view: 32.33
Image height: 15.14 mm
Lens length: 125.59 mm
Back focus: 2.00 mm