ALEXANDRIA, Va., March 26 -- United States Patent no. 12,259,534, issued on March 25, was assigned to CANON K.K. (Tokyo).
"Zoom lens and optical apparatus" was invented by Makoto Nakahara (Utsunomiya, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a rear unit including a plurality of lens units. During zooming, a distance between adjacent lens units of the first, second and plurality of lens units changes. The rear unit includes an aperture stop and a negative lens unit disposed closest to an object among at least one lens ...