Disclosed are an adaptor lens for increasing a magnification of a scope and a sight comprising the same. The adaptor lens for increasing a magnification of a scope of the present invention comprises: an adapter lens body detachably coupled to a sight main body having an objective lens group; a convex lens part provided in the adapter lens body so as to be disposed in front of the objective lens group; and a concave lens part provided in the adapter lens body and disposed between the convex lens part and the objective lens group.

Disclosed are an adaptor lens for increasing a magnification of a scope and a sight comprising the same. The adaptor lens for increasing a magnification of a scope of the present invention comprises: an adapter lens body detachably coupled to a sight main body having an objective lens group; a convex lens part provided in the adapter lens body so as to be disposed in front of the objective lens group; and a concave lens part provided in the adapter lens body and disposed between the convex lens part and the objective lens group.

A lens attachment module is configured for coupling with a zoom module of a finite conjugate optical assembly. The lens attachment module includes a lens assembly that has a positive focal length, and exhibits a pupil size of between 16 and 25 mm and a pupil depth greater than 50 mm.

A lens attachment module is configured for coupling with a zoom module of a finite conjugate optical assembly. The lens attachment module includes a lens assembly that has a positive focal length, and exhibits a pupil size of between 16 and 25 mm and a pupil depth greater than 50 mm.

A variable magnification optical system comprising a plurality of lens groups and, upon varying a magnification, distances between respective lens groups in the plurality of lens groups being varied. The plurality of lens groups comprises an object side focusing lens group which is moved upon carrying out focusing and at least one image side focusing lens group disposed in a more image side than the object side focusing lens group and moved with a trajectory differing from that of the object side focusing lens group, upon carrying out focusing. The predetermined conditional expressions are satisfied. Thus, variations in aberrations upon varying magnification from the wide angle end state to the telephoto end state as well as variations in aberrations upon carrying out focusing from an infinite distance object to a close distance object can be suppressed superbly.

Provided is a zoom lens including, in order from an object side to an image side, a positive first lens unit, a negative second lens unit, a positive third lens unit, a positive fourth lens unit and a rear lens group consisting of at least one lens unit. An interval between each pair of adjacent lens units is changed during zooming. The rear lens group includes a negative N-th lens unit configured to move during focusing. The second lens unit and the third lens unit are configured to move during zooming. A focal length of the second lens unit, a focal length of the third lens unit, a focal length of the fourth lens unit, a lateral magnification of the fourth lens unit at a wide angle end and a lateral magnification of the fourth lens unit at a telephoto end are appropriately set.

Provided is a zoom lens including, in order from an object side to an image side, a positive first lens unit, a negative second lens unit, a positive third lens unit, a positive fourth lens unit and a rear lens group consisting of at least one lens unit. An interval between each pair of adjacent lens units is changed during zooming. The rear lens group includes a negative N-th lens unit configured to move during focusing. The second lens unit and the third lens unit are configured to move during zooming. A focal length of the second lens unit, a focal length of the third lens unit, a focal length of the fourth lens unit, a lateral magnification of the fourth lens unit at a wide angle end and a lateral magnification of the fourth lens unit at a telephoto end are appropriately set.

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, one or two intermediate lens units having positive refractive powers, and a final lens unit having a positive power. A distance between each pair of adjacent lens units changes in zooming from a wide-angle end to a telephoto end. The one or two intermediate lens units include three or four lenses. The one or two intermediate lens units include a single lens having a positive refractive power and being closest to the image side. The final lens unit includes three or four lenses. The zoom lens satisfies specified conditional expressions.

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, one or two intermediate lens units having positive refractive powers, and a final lens unit having a positive power. A distance between each pair of adjacent lens units changes in zooming from a wide-angle end to a telephoto end. The one or two intermediate lens units include three or four lenses. The one or two intermediate lens units include a single lens having a positive refractive power and being closest to the image side. The final lens unit includes three or four lenses. The zoom lens satisfies specified conditional expressions.

A zoom optical system (ZL) comprises, in order from an object: a first lens group (G1) having a positive refractive power; and a second lens group (G2) having a negative refractive power, wherein upon zooming, a distance between the adjacent lens groups changes. The zoom optical system further comprises an aperture stop (S) disposed closer to an image than the second lens group (G2, and satisfies the following conditional expression:

0.10<Df/Dr<0.90 where Df: a distance to the aperture stop from a lens surface of the zoom optical system closest to an object in a wide angle end state, and Dr: a distance from the aperture stop to a lens surface of the zoom optical system closest to the image in the wide angle end state.