Patent ID: 11914122
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A zoom lens comprising a plurality of lens units, the plurality of lens units consisting of, in order from an object side to an image side:
a first lens unit having a negative refractive power; and
a second lens unit having a positive refractive power,
wherein an interval between the first lens unit and the second lens unit changes during zooming,
wherein the first lens unit includes two meniscus lenses each having a negative refractive power and a convex shape toward the object side,
wherein the first lens unit further includes one biconcave lens and one biconvex lens,
wherein at least one of the two meniscus lenses includes an aspherical surface having a positive aspherical amount,
wherein the second lens unit consists of a first subunit, a second subunit, and a third subunit in order from the object side to the image side,
wherein the second subunit consists of a first cemented lens of a negative lens and a positive lens in order from the object side to the image side and a second cemented lens of a negative lens and a positive lens in order from the object side to the image side, and
wherein the third subunit consists of a negative lens, a positive lens, and a positive lens in order from the object side to the image side.