The zoom lens consists of a first lens group, a front group, a middle group, and a rear group, in order from an object side. The first lens group has a positive refractive power and includes a negative lens and a positive lens, successively in order from a position closest to the object side to an image side. The front group consists of one or more lens groups that move during zooming and has a negative refractive power as a whole throughout an entire zoom range. The middle group includes only one lens group as a lens group. The rear group consists of a plurality of lens groups. An aperture stop is disposed between a lens surface closest to the image side in the front group and a lens surface closest to the object side in the rear group. The zoom lens satisfies predetermined conditional expressions.

A zoom lens includes, from an object side to an image side, a positive first lens unit configured not to move for zooming, at least three movable lens units configured to move for zooming, and a positive final lens unit closest to the image side in lens units and configured not to move for zooming. In the at least three movable lens units, a lens unit closest to the image side has a positive power, and a lens unit second closest to the image side has a negative power. The first lens unit includes a first sub unit closest to the object side and configured not to move for focusing and a second sub unit configured to move for focusing. The final lens unit includes a positive lens closest to the image side in elements having a refractive power in the final lens unit. Predetermined inequalities are satisfied.

A zoom lens includes, in order from an object side to an image side, a first lens unit that has a positive refractive power and does not move for zooming, a second lens unit that has a negative refractive power and moves in zooming, at least two lens units that move in zooming, and a final lens unit that has a positive refractive power, is disposed closest to the image side, and does not move for zooming. The first lens unit includes, in order from the object side to the image side, a first sub-lens unit that has a negative refractive power and does not move for focusing, a second sub-lens unit that has a negative refractive power and moves for focusing, and a third sub-lens unit having a positive refractive power. A distance between the second sub-lens unit and the third sub-lens unit changes for focusing. Predetermined inequalities are satisfied.

A zoom lens includes, in order from an object side, a first lens group of which at least a part moves for focusing, a plurality of lens groups which move in zooming, an aperture stop, and a final lens group which does not move for zooming. The final lens group includes a separation element PR for separating an incident light thereon into a transmitted light and a reflected light, a relay unit LR having a positive refractive power on which the transmitted light is incident, and a relay unit LA having a positive refractive power on which the reflected light is incident. An inequality about Fwp/Fw is satisfied, where Fw is a focal length at a wide angle end of the zoom lens via the relay unit LR and FwP is a focal length at the wide angle end of the zoom lens via the relay unit LA.

A zoom lens including, in order from an object side: a positive first lens unit that does not move for zooming; a negative second lens unit that moves during the zooming; a negative third lens unit that moves along a locus convex to the object side during the zooming; an aperture stop; and a positive fourth lens unit that does not move for the zooming. The third lens unit includes a cemented lens formed by cementing a single negative lens and a single positive lens and a single negative lens. A focal length (fn1) of the single negative lens included in the cemented lens, a focal length (fp) of the single positive lens included in the cemented lens, and a lateral magnification (β3w) of the third lens unit at a wide angle end are each appropriately set.

Provided is a zoom lens including, from object side: one/two first positive units including a lens unit arranged at closest to object side not movable for zooming ; one/two second negative units movable toward image side for zooming from wide end to telephoto end; one/two third units including a negative unit arranged closest to object side and movable along a locus convex toward object side for zooming; a fourth positive unit movable for zooming; and a fifth unit, and including an aperture stop in image side of the fourth unit. A distance between object side surface of the first unit and the aperture stop, a length of the first unit, and movement amounts of the second unit from wide end to telephoto end and of the fourth unit from wide end to an intermediate zoom state where the second and third units are closest to each other are set appropriately.

The variable magnification optical system consists of, in order from an object side to an image side, a first lens group that has a positive refractive power, a plurality of lens groups, and a final lens group that has a positive refractive power. During changing magnification, a spacing between the first lens group and the lens group closest to the object side among the plurality of lens groups changes, all spacings between adjacent lens groups in the plurality of lens groups change, and a spacing between the lens group closest to the image side and the final lens group among the plurality of lens groups changes.

A zoom lens includes, in order from an object side, a positive first lens unit configured not to move for zooming, two or more intermediate lens units configured to move for zooming, and a positive rear lens unit. A distance between each pair of adjacent lens units changes for zooming. The first lens unit includes, in order from the object side, a negative first sub lens unit configured not to move for focusing, a positive second sub lens unit configured to move for focusing, and a positive third sub lens unit. Specific conditional expressions are satisfied with respect to a focal length and a thickness of the first lens unit, focal lengths of the zoom lens at a wide angle end and a telephoto end, a backfocus, and a focal length of the first sub lens unit.

A zoom lens includes, from an object side a first lens unit (a positive refractive power) configured not to move for zooming, two or more intermediate lens units configured to move in zooming, and a rear lens unit (a positive refractive power), wherein an interval between each pair of adjacent lens units changes in zooming, the first lens unit includes, from the object side, a first lens subunit (a negative refractive power) configured not to move for focusing, a second lens subunit (a positive refractive power) configured to move for focusing, and a third lens subunit (a positive refractive power), the zoom lens satisfies specific inequalities concerning a focal length of the first lens unit, a length on an optical axis from a last surface to a rear principal point of the first lens unit, and a focal length of the zoom lens at a telephoto end.

A zoom lens includes in order from object side: a positive first unit not moving for zooming; a negative second unit moving in an optical axis direction for zooming; a positive M unit moving in the optical axis direction for zooming; and a positive R unit disposed closest to the image side, wherein the first unit includes a subunit moving for focusing, wherein the zoom lens includes an aperture stop closer to the image side than the second unit, wherein a length on the optical axis from a surface of the R unit closest to the object side to a surface of the R unit closest to an image side, a length on the optical axis from the surface of the R unit closest to an image side to a rear principal point of the R unit, and a back focus of the zoom lens are defined.