Canon Patent: 15-70mm F2.8-4 IS, 15-70mm F4 IS And 15-85mm F2.8-5.6 IS for APS-C
A new Canon patent application for three lenses for the RF mount and cameras with APS-C imaging sensor. Canon patent application 2022013994 (Japan, published 8/14/2023) discusses optical formulas for three…