Canon patent for 9-20mm f/4.5-5.6 image-stabilised lens for APS-C DSLRs
Canon patent for a new lens, an ultra-wide angle and image-stabilised 9-20mm f/4.5-5.6 lens. The described optical formula refers to an APS-C sensor. Patent Publication No. 2015-31869 Published 2015.2.16 Filing…