Here are the new Canon Patents for RF 600mm f/4 and RF 400mm f/2.8 Super-Telephoto Lenses. Canon patent application 2022-22771 discusses optical formulas for RF mount mirrorless cameras.
See previous patent reports for Canon RF 400mm f/4 DO IS Extender 1.4x, Canon RF 600mm f/4 IS Extender 1.4x lenses.
[Publication number] P2022052220
[Publication date] APRIL 4, 2022
[Patent application title] Optical system and imaging device and imaging system
Example 1 (600mm F4)
Focal length of XY cross section 575.00
Focal length of X-Z cross section 575.00
F number 4.10
Half angle of view (°) 2.15 Semi image
height 21.64
Back focus 88.87
Example 2 (400 mm F2.8)
Focal length of XY cross section 399.58 Focal length of
X-Z cross section 399.58
F number 2.90
Half angle of view (°) 3.10 Half image
height 21.64
Back focus 50.30