300mm F2.8, 400mm F4, and 500mm F4 from TAMRON

TAMRON filed patent of 300mm F2.8, 400mm F4, and 500mm F4 for a 35mm full-frame sensor.

【公開番号】特開2017-223891(P2017-223891A) click here
【公開日】平成29年12月21日(2017.12.21)
【発明の名称】光学系及び撮像装置

Specifications and lens arrangements

Embodiment 1: 300mm F2.8
Focal length: 304.799 mm
F No.: 2.8
ω: 3.997
Image height: 21.64 mm
Back focus: 70.1919 mm
Lens length: 298.38 mm


Embodiment 2: 400mm F4
Focal length: 396.296 mm
F No.: 4.0
ω: 2.963
Image height: 21.64 mm
Back focus: 102.3549 mm
Lens length: 332.36 mm


Embodiment 3: 500mm F4
Focal length: 485.045 mm
F No.: 4.001
ω: 2.530
Image height: 21.64 mm
Back focus: 125.2621 mm
Lens length: 420.001 mm