Asobinet spotted a newly published patent that describes the optical design of this 17-50mm f/4 Full Frame E-mount lens with internal zoom: Focal length: 17.520-48.483 F-value: 4.120 Half angle of view: 110.747-47.366 Image height: 21.633 Overall length: 134.456 Back focus: 18.462-50.815 ...
Published By: SonyAlphaRumors - Monday, 17 July, 2023