New Patents: Canon RF 300mm f/2.8 DO & 400mm f/2.8 DO Lenses

Canon recently filed two new diffractive optics lens patents in Japan: 300mm f/2.8 DO & 400mm f/2.8 DO. These two new lenses are probably RF mount lenses, and are expected to come in 2020 alongside an EOS R version of the EOS-1D X Mark II.

Japan Patent Application 2018-189878

Focal distance: 392.58
F number:2.91
A half field angle: 3.15
Image height: 21.64
Length of the lens: 363.53
BF: 59.15

Focal distance: 293.40
F number: 2.91
a half field angle: 4.22
Image height: 21.64
length of the lens: 274.00
BF: 59.35

Reminder: Canon is allegedly working on several new RF mount lenses and the first Canon super telephoto lens for RF mount will be a diffractive optics (DO) lens.

Read more: Canon Cyber Monday Deals 2018.

Via: CanonRumors