A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, and a subsequent unit including a plurality of lens units, The first lens unit is configured not to move for zooming. A distance between each pair of adjacent lens units changes in zooming. The subsequent unit includes, in order from the image side to the object side, a lens having a positive refractive power and configured not to move for zooming, a moving positive lens unit consisting of one or two lenses, having a positive refractive power, and configured to move in zooming, and a diaphragm configured to move in zooming. The diaphragm is closer to the object side at the wide-angle end than at the telephoto end. A predetermined condition is satisfied.

A zoom lens includes, in order from an object side to an image side, a lens unit closest to the object side and having a positive refractive power, an intermediate unit including at least three lens units and an aperture stop, and a lens unit closest to the image side and having a positive refractive power. A distance between each pair of adjacent lens units changes in zooming. The lens unit closest to the object side is configured not to move for zooming, and the at least three lens units and the aperture stop are configured to move in zooming. The lens unit closest to the image side includes a first positive lens. A predetermined condition is satisfied.

Provided is a zoom lens including, in order from an object side: a positive first unit not moving for zooming; one or two moving units move for zooming and including a negative unit; a negative unit moving for zooming; a positive unit including a stop and moving for zooming; and a positive final unit not moving for zooming. The distances on the optical axis, from surface, closest to the object side, of the first unit to a surface, closest to an image side, of the first unit, from the surface, closest to the object side, of the first unit to the stop at the wide angle end, from the surface, closest to the image side, of the first unit to the stop at the wide angle end, and the maximum distance from the surface, closest to the image side, of the first unit to the stop are appropriately set.

The present disclosure relates to zoom lenses and optical devices using the same. A zoom lens may include in order from an object side to an image side: a first lens group, a second lens group, a third lens group, a fourth lens group; and a fifth lens group. The zoom lens may satisfy the following conditions: −2.28≤f.sub.2/f.sub.w′≤−1.08, and 0.15≤TTL/(BFL*f.sub.w′)≤0.45, wherein f.sub.2 denotes a focal length of the second lens group, f.sub.w′ denotes a focal length of the zoom lens at a wide angle end, TTL denotes a total track length of the zoom lens, and BFL denotes a back focal length of the zoom lens.

A zoom lens includes: a master lens including in order from an object side: a positive first lens unit configured not to move for zooming; a negative second lens unit configured to move for zooming; at least one lens unit configured to move for zooming; and a positive relay lens unit arranged closest to the image side; and an extender lens unit configured to change a focal length range of the zoom lens by one of: being inserted in place of a lens unit arranged adjacent to the relay lens unit on the object side; and being inserted into a space adjacent to the positive relay lens unit on the object side, wherein the extender lens unit includes a positive lens Gp, and an Abbe number and a partial dispersion ratio of the positive lens Gp are suitably set.

Provided is a zoom lens consisting of, in order from an object side to an image side: a positive front lens unit configured not to move for zooming; a plurality of magnification-varying lens units including two magnification-varying lens units having negative refractive powers configured to move for zooming; and a positive rear lens unit configured not to move for zooming, in which a focal length of the front lens unit, a focal length of a magnification-varying lens unit having a negative refractive power and arranged closest to the object side in the plurality of magnification-varying lens units, a focal length of a magnification-varying lens unit having a negative refractive power and arranged closest to the image side in the plurality of magnification-varying lens units, and a focal length of the rear lens unit are suitably set.

A zoom lens includes, in order from an object side to an image side, a first lens unit configured not to move for zooming, a plurality of zooming lens units configured to move in zooming, a front relay lens unit configured not to move for zooming, an extender lens unit insertable into and removable from an optical path for changing a focal length range of the zoom lens, and a rear relay lens unit configured not to move for zooming, and satisfies specific conditional expressions.

Provided is a zoom lens including, in order from an object side: a positive first lens unit configured not to move for zooming; a negative second lens unit configured to move in zooming; a negative third lens unit configured to move in zooming; and a positive lens unit configured not to move for zooming, wherein an interval between each pair of adjacent lens units is changed in zooming, wherein the positive first lens unit consists of, in order from the object side: a first lens sub unit configured not to move for focusing; and a second lens sub unit configured to move toward the object side for focusing from infinity to minimum object distance, the first lens sub unit including a negative lens arranged closest to the object side, and wherein an Abbe number of the negative lens and a partial dispersion ratio of the negative lens are appropriately set.

Provided is a zoom lens including, in order from an object side to an image side: a front lens unit having a positive refractive power and configured not to move for zooming; one or two intermediate lens units having a negative refractive power as a whole and configured to move for zooming; a first rear lens unit having a negative refractive power and configured to move for zooming; a second rear lens unit having a positive refractive power and configured to move for zooming; and a third rear lens unit having a positive refractive power and configured not to move for zooming. In the zoom lens, all intervals between adjacent lens units are changed for zooming, and focal lengths of the front lens unit, the one or two intermediate lens units, the first rear lens unit, and the zoom lens at a telephoto end are appropriately set.

Provided is a zoom lens including, in order from an object side: a positive first unit not moving for zooming; one or two moving units move for zooming and including a negative unit; a negative unit moving for zooming; a positive unit including a stop and moving for zooming; and a positive final unit not moving for zooming. The distances on the optical axis, from surface, closest to the object side, of the first unit to a surface, closest to an image side, of the first unit, from the surface, closest to the object side, of the first unit to the stop at the wide angle end, from the surface, closest to the image side, of the first unit to the stop at the wide angle end, and the maximum distance from the surface, closest to the image side, of the first unit to the stop are appropriately set.