200-800mm F6.5 from TAMRON

TAMRON filed a patent of 200-800 mm f/6.5 for 35mm full-frame sensor cameras, not sure for mirroless.

【公開番号】特開2020-106777(P2020-106777A) click here
【公開日】令和2年7月9日(2020.7.9)
【発明の名称】ズームレンズ及び撮像装置

Embodiment 1
Focal length: 205.426 447.698 774.302 mm
F number: 6.583 6.586 6.583
Angle of view: 6.008 2.752 1.586
Image height: 21.633 21.633 21.633 mm
Back focus: 56.1827 mm
Total length: 415.348 415.348 415.348 mm