New Canon patents for 100-400mm and 70-300mm f/4.5-5.6 lenses with diffractive optical element (DOE)
Canon 100-400mm f:4.5-5.6 DO lens patent
Canon 70-300mm f:4.5-5.6 DO lens patent
A quick update to my last post: Canon filed new patents for a 100-400 mm f/4.5-5.6 and 70-300 mm f/4.5-5.6 lenses with diffractive optical element (DOE).
Via Egami