US Patent Issued to CANON on Jan. 27 for "Zoom lens, image pickup apparatus, and image pickup system" (Japanese Inventor)

ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,535,664, issued on Jan. 27, was assigned to CANON K.K. (Tokyo).

"Zoom lens, image pickup apparatus, and image pickup system" was invented by Shunji Iwamoto (Tochigi, 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 positive refractive power, a second lens unit having negative refractive power, a third lens unit having positive refractive power, and a rear group. A distance between adjacent lens units changes during zooming from a wide-angle end to a telephoto end. The first lens unit is fixed relative to an image plane during zooming from the wide-angle end...