ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,461,348, issued on Nov. 4, was assigned to CANON K.K. (Tokyo).
"Zoom lens and image pickup apparatus having the same" was invented by Makoto Nakahara (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 negative refractive power, a second lens unit having positive refractive power, and a rear group including one or more lens units. Distances between adjacent lens units change during zooming. The first lens unit includes, in order from the object side to the image side, three or more negative lenses. The second lens unit consists of a positive lens conf...