New Canon Patents filed for several new RF mount wide-angle models. The patent application describes the 16-28mm f/2.8, 15-28mm f/2.8-4 IS and 15-28mm f/4-5.6 IS Lenses for Canon full-frame mirrorless cameras.
Canon patent application 2022063727 (Japan) discusses optical formulas for three RF mount lenses:
- RF 16-28mm f/2.8
- RF 15-28mm f/2.8-4
- RF 15-28mm f/4-5.6 IS
[Publication number] P2022063727
[Publication date] APRIL 22, 2022
[Patent application title] Optical system and imaging device