A zoom lens includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a rear lens group having one or more lens units. The first through third lens units and the rear lens group are disposed in this order from an object side to an image side. The first lens unit is stationary when zooming. A reflection member including a reflective surface configured to bend an optical path is disposed in an optical path of the first lens unit. The second lens unit moves in a direction having a component in a direction perpendicular to an optical axis when correcting image blurring. The lateral magnification 2t of the second lens unit when being focused at infinity at a telephoto end is set appropriately.

To obtain a zoom lens easily performing image blur correction and maintaining optical performance while performing image blur correction while restricting an increase in size of the lens. A zoom lens including, in order from an object side: a positive first unit; a negative second unit; a positive third unit; and a rear group that has one or more units. Spacings between adjacent units change during zooming. First and second correction systems rotatable about first and second centers on or in the vicinity of an optical axis during blur correction are respectively constituted by at least a part of the second unit and at least a part of an optical system disposed on image side of the second unit. The first and second centers are on image side of a surface vertex of the respective first and second correction systems closest to the object side.

A zoom lens includes in order from an object side to an image side, a positive first lens unit that is not moved for zooming, a negative second lens unit that is moved during zooming, at least one zooming lens unit that is moved during zooming, a stop, and a positive fixed lens unit that is not moved for zooming. The first lens unit includes in order from the object side to the image side, a first lens sub-unit that is not moved for focusing, a positive second lens sub-unit that is moved toward the object side when focusing to an object at short distance from an object at infinite distance, and a positive third lens sub-unit that is moved during focusing. The second lens sub-unit includes a negative meniscus lens having a convex surface facing the image side.

An optical system includes, in order from an object side to an image side, a first lens unit, a second lens unit having negative refractive power, a third lens unit having positive refractive power, and a fourth lens unit. A distance between adjacent lens units changes during focusing. The third lens unit includes a plurality of lenses. The second lens unit and the third lens unit move during focusing. Predetermined inequalities are satisfied.

A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a rear lens group including one or more lens units. For zooming, the first to third lens units move, thereby changing intervals between adjacent ones of these lens units. For the zoom lens, a focal length (f1) of the first lens unit, focal lengths (fw, ft) of the zoom lens at a wide angle end and at a telephoto end, respectively, and amounts (M2, M3) by which the second and third lens units, respectively, move when zooming from the wide angle end to the telephoto end are appropriately defined.

Provided is a zoom lens that has a large aperture ratio, has a suppressed total length, has a small center of gravity movement during zooming or focusing, and can perform quiet auto focus, and that is suitable for video capturing. A zoom lens has, in order from an object side: a first lens group G1 having a negative refractive power; a middle lens group GM having a positive refractive power as a whole; a rear lens group GR; and a final lens group GN. The middle lens group GM includes three or more lens groups and includes a focus lens group that moves along an optical axis during focusing from infinity to a short distance. The rear lens group GR includes one or more lens groups. A distance between each of the groups changes during zooming from a wide-angle end to a telephoto end.

A variable magnification optical system consists of, in order from an object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, an intermediate group, and a final lens group having a refractive power. The intermediate group consists of one or more and five or fewer lens groups. An aperture stop is disposed between a lens surface of the second lens group closest to the image side and a lens surface of the final lens group closest to the object side. The first lens group includes, in consecutive order from a position closest to the object side to an image side, a negative lens, and a positive lens. The variable magnification optical system satisfies a predetermined conditional expression.

This optical system (OL) has a first lens group (G1) having positive refractory power, a second lens group (G2), a third lens group (G3), and a fourth lens group (G4) which are aligned in order from an object side along an optical axis, wherein when focused from an infinity object to a short-distance object, the second lens group (G2) and the third lens group (G3) move in mutually different trajectories along the optical axis, and the second lens group (G2) and the third lens group (G3) are composed of three or less lenses in total.

A zoom lens consists of four or more lens units including, in order from an object side to an image side, first, second, and third lens units having positive, negative, and positive refractive powers, respectively. During zooming from a wide-angle end to a telephoto end, the first lens unit moves, a distance between the first lens unit and the second lens unit is widened, and a distance between the second lens unit and the third lens unit is narrowed. The first lens unit consists of a single positive lens, the second lens unit includes three single lens elements, each having a negative refractive power, arranged continuously in order from the object side to the image side, predetermined conditions are satisfied.

A zoom optical system comprises a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a succeeding lens group, which are arranged in order from an object side. During zooming, distances between adjacent lens groups change, and the first lens group is fixed with respect to an image surface. During zooming from a wide angle end state to a telephoto end state, the third lens group moves toward an image surface. The succeeding lens group includes a last lens group arranged to be nearest to the image surface. Further, the following conditional expression is satisfied.
10.00<f3/(fE)<3.50, where f3 represents a focal length of the third lens group, and fE represents a focal length of the last lens group.