Patent: Canon RF 13-21mm f/2.8L Lens

Canon has filed a new lens patent for Canon EOS R full frame mirrorless cameras. The lens patent is RF 13-21mm f/2.8L lens. See the details below:

RF 13-21mm f/2.8:

Zoom ratio: 1.58
Focal length: 13.40 17.30 21.20 mm
F number: 2.88 2.88 2.88
Half angle of view: 58.23 51.35 45.58
Image height: 21.64 21.64 21.64 mm
Lens length: 150.15 136.89 130.04 mm
Back focus: 20.96 25.13 29.31 mm