Tag Archives: EF 600mm f/4 DO IS USM

Canon Patent For EF 600mm f/4 DO IS USM lens


Canon filed a new patent in Japan. The new patent describes the EF 600mm f/4 DO IS lens designed for Canon DSLRs with full-frame image sensors. A similar patent with diffractive optical (DO) lens can be seen here. As EF 400mm f/4 DO IS II telephoto prime lens became official and currently priced for $6,899.95 at Amazon. Canon lenses which feature theContinue Reading