The imaging lens consists of, in order from an object side: a first lens group that has a positive refractive power; an aperture stop; a second lens group that has a positive refractive power; and a third lens group. The second lens group consists of two or less lenses, and moves to the object side during focusing from an object at infinity to an object at a closest distance. The third lens group includes, successively in order from at a position closest to an image side, a rear lens group that has a positive refractive power and a vibration reduction lens group that has a negative refractive power. Then, Conditional Expression (1) is satisfied.

1.5<f3ois/f3r<0.85(1)

The imaging lens consists of, in order from an object side: a first lens group that has a positive refractive power; an aperture stop; a second lens group that has a positive refractive power; and a third lens group. The second lens group consists of two or less lenses, and moves to the object side during focusing from an object at infinity to an object at a closest distance. The third lens group includes, successively in order from at a position closest to an image side, a rear lens group that has a positive refractive power and a vibration reduction lens group that has a negative refractive power. Then, Conditional Expression (1) is satisfied.

0.04<D2o/L<0.1(1)

Provided is a zoom lens including a plurality of lens units in which intervals between adjacent lens units are changed during zooming. The plurality of lens units consist of, in order from object side to image side, a positive first lens unit, a negative second lens unit and a rear lens group including at least one lens unit. A minimum F-number of zoom lens during zooming from wide angle end to telephoto end, an interval, at wide angle end, between a lens surface on object side of a lens arranged closest to object side of rear lens group and a lens surface on image side of a lens arranged closest to image side of rear lens group, a total lens length of zoom lens at wide angle end, and the widest lens interval at wide angle end among lens intervals included in rear lens group are each appropriately set.

A zoom lens includes a plurality of lens units, which consist of, in order from an object side to an image side, a first lens unit having positive refractive power, an intermediate group including a plurality of lens units, and a rear lens unit. A distance between adjacent lens units changes during zooming from a wide-angle end to a telephoto end. The first lens unit is fixed relative to an image plane for zooming from the wide-angle end to the telephoto end. The first lens unit consists of a plurality of subunits in which a distance between adjacent subunits changes during focusing, and the plurality of subunits include, in order from the object side to the image side, a first subunit that does not move for focusing, a second subunit having positive refractive power that moves for focusing, and a third subunit having negative refractive power. A predetermined inequality is satisfied.

An object of the present invention is to provide a zoom lens that can perform favorable correction of chromatic aberration in the entire zoom range, and can have higher performance and a smaller size than conventional ones; and an imaging apparatus including the zoom lens. To achieve the object, provided are a zoom lens and an imaging apparatus including the zoom lens. The zoom lens includes, in order from an object side: a positive first lens group G1; a negative second lens group G2; and a GR group including one or more lens groups. In the zoom lens, changing focal length is performed by varying intervals between the lens groups. The GR group includes convex lenses GpH and GpL satisfying predetermined conditional expressions. The convex lens GpH is the positive lens which is arranged second position or after from the object side in positive lenses in the GR group.

The present invention provides a zoom lens that can perform favorable correction of chromatic aberration in the entire zoom range, and can have higher performance and a smaller size than conventional ones; and an imaging apparatus including the zoom lens. To achieve the object, provided are a zoom lens and an imaging apparatus including the zoom lens. The zoom lens includes, in order from an object side: a positive first lens group G1; a negative second lens group G2; and a GR group including one or more lens groups. In the zoom lens, changing focal length is performed by varying intervals between the lens groups. The GR group has at least two cemented surfaces having negative refractive power, convex lenses GpH and GpL satisfying predetermined conditional expressions. An aperture stop is arranged in the first lens group or after. The zoom lens satisfies predetermined conditional expressions.

The zoom lens consists of, in order from the object side, a first lens group that has a positive refractive power and remains stationary during zooming, a second lens group that moves during zooming, and a subsequent lens group. The first lens group has a negative lens at a position closest to the object side. The subsequent lens group has, successively in order from a position closest to the image side, a final positive lens group that remains stationary during zooming, a positive lens group that moves during zooming, a stop, and a negative lens group that moves during zooming. The stop moves integrally with the positive lens group during zooming. The stop first moves to the object side, and reversely moves during zooming from the wide-angle end to the telephoto end. Predetermined conditional expressions are satisfied.

A projection zoom lens is configured to have an intermediate group that essentially consists of two or three moving lens groups positioned between a first lens group and a final lens group, both of which have positive refractive powers and are fixed while changing magnification. The projection zoom lens changes magnification by moving these moving lens groups. Further, the projection zoom lens satisfies conditional formulas (1) and (2) below:
d/fw<1.0(1),
1.5<fe/fw<7.0(2),
where, d: the distance between the most-reduction-side lens surface of the intermediate group and the most-reduction-side lens surface of the final lens group along the optical axis at the wide angle end, fw: the focal length of the entire system at the wide angle end, and fe: the focal length of the final lens group.

An optical system includes: a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group, disposed in this order along an optical axis starting from an object side, wherein: the second lens group is movable along the optical axis to perform focusing from an infinity-distance object to a short-distance object; and the third lens group comprises: a vibration-proofing lens group configured to be movable in a direction having a component perpendicular to the optical axis to perform image surface correction on image blurring; and an adjustment lens group that is disposed closer to an image side than the vibration-proofing lens group is, the adjustment lens group including a negative lens Ln and a lens group having a positive refractive power, disposed next to the negative lens Ln, and the adjustment lens group being capable of adjusting an air gap between the negative lens Ln and the lens group having a positive refractive power.

A first lens unit and a third lens unit are constituted by a lens which is rotationally symmetrical with respect to an optical axis and are disposed on the same optical axis, a first freeform-curved surface lens and a second freeform-curved surface lens have the same shape and are disposed to be rotated at 180 degrees with respect to the optical axis. Further, a refractive power of a second lens unit is variable due to the first freeform-curved surface lens and the second freeform-curved surface lens moving in opposite directions. The first freeform-curved surface lens and the second freeform-curved surface lens are moved in the Y-axis direction in association with movement of some of lens groups constituting the first lens unit and the third lens unit when positional states of the lenses are changed from a wide-angle end state to a telephoto end state.