Patent ID: 11347034

Abstract:
A zoom lens includes, from the object side, a positive first lens unit not moving for zooming, a negative second lens unit moving for zooming, and a positive third lens unit moving for zooming. The second lens unit includes a negative lens closest to the object side, the third lens unit consists of a 3-1 sub-lens unit and a 3-2 sub-lens unit from the object side. Conditional expressions −18.0<f1/f2<−3.0,0.2<f21/f2<3.6,−0.95<f21/r2<−0.25,7.0<β2t/β2w<125.0, and0.3<f31/f32<2.5, are satisfied where f1, f2, and f21 are the focal lengths of the first lens unit, the second lens unit, and the negative lens, r2 is an image-side radius of curvature of the negative lens, β2w and β2t are the lateral magnifications of the second lens unit at the wide angle end and the telephoto end, and f31 and f32 are the focal lengths of the 3-1 sub-lens unit and the 3-2 sub-lens unit.