ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,449,642, issued on Oct. 21, was assigned to Canon K.K. (Tokyo).
"Converter lens, interchangeable lens, and image capturing apparatus" was invented by Shinichiro Saito (Utsunomiya, Japan) and Hiroki Ebe (Utsunomiya, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A converter lens has negative refractive power, and is disposed on an image side of a master lens so that a focal length of an entire system becomes greater than a focal length of the master lens alone. The converter lens includes a first lens element closest to an object and a second lens element next to an image side of the first lens element with a space between the first lens element an...