A zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power and a second lens unit having a positive refractive power. A distance between the first lens unit and the second lens unit changes during zooming. The second lens unit includes an aperture stop and two or more negative 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 negative refractive power and a second lens unit having a positive refractive power. A distance between the first lens unit and the second lens unit changes during zooming. The second lens unit includes an aperture stop and two or more negative lenses. The zoom lens satisfies specified conditional expressions.

A projection zoom lens assembly for a digital cinema projection system includes three optical groups. A first optical group includes one or more wide angle lenses for projecting digital cinema images. A second optical group includes a set of zoom optical groups each comprising two or more lenses, including a first independently movable zoom group, a second independently movable zoom group, and a third zoom group. A third optical group includes multiple lenses for receiving images for projection.

A projection zoom lens assembly for a digital cinema projection system includes three optical groups. A first optical group includes one or more wide angle lenses for projecting digital cinema images. A second optical group includes a set of zoom optical groups each comprising two or more lenses, including a first independently movable zoom group, a second independently movable zoom group, and a third zoom group. A third optical group includes multiple lenses for receiving images for projection.

A zoom lens has a four-group zoom configuration, in order from the object side to the image side, consisting of negative, positive, positive, and positive refractive power. The zoom lens carries out zooming from the wide-angle end to the telephoto end mainly by changing the distance between the third lens group and the fourth lens group. Also, the distance between the second lens group and the third lens group may be decreased in the zooming. Focusing is carried out mainly by moving the second lens group along the optical axis. Such a zoom lens is thin and small in size, and has a great imaging performance.

A mobile terminal is provided. The mobile terminal includes a display screen on a terminal housing and a periscope optical zoom lens. The display screen and the periscope optical zoom lens are arranged in a non-overlapping manner in a thickness direction of the terminal, and the periscope optical zoom lens is located in a top area of the terminal. Additionally, the periscope optical zoom lens is configured to collect an image in an optical signal form by means of optical zoom, so that an optical-to-electrical conversion chip converts the image in an optical signal form into an image in a digital signal form and the display screen is configured to display the image in a digital signal form.

A mobile terminal is provided. The mobile terminal includes a display screen on a terminal housing and a periscope optical zoom lens. The display screen and the periscope optical zoom lens are arranged in a non-overlapping manner in a thickness direction of the terminal, and the periscope optical zoom lens is located in a top area of the terminal. Additionally, the periscope optical zoom lens is configured to collect an image in an optical signal form by means of optical zoom, so that an optical-to-electrical conversion chip converts the image in an optical signal form into an image in a digital signal form and the display screen is configured to display the image in a digital signal form.

A zoom lens system includes a positive first lens group, a negative second lens group, in that order from the object side, and a positive n.sup.th lens group provided closest to the image side. During zooming from the short to long focal length extremities, the first lens group and the n.sup.th lens group remain stationary and the second lens group moves. A positive m.sup.th lens group is provided between the second and n.sup.th lens groups. The following conditions (1) and (2) are satisfied:
1.23<f1/fn<1.50  (1), and
1.20<fn/fm<1.60  (2),
wherein f1, fn and fm designate the focal lengths of the first, n.sup.th and m.sup.th lens groups, respectively, wherein n is a positive integer of 4 or greater, and m is a positive integer of 3 or greater.

A zoom lens system includes a positive first lens group, a negative second lens group, in that order from the object side, and a positive n.sup.th lens group provided closest to the image side. During zooming from the short to long focal length extremities, the first lens group and the n.sup.th lens group remain stationary and the second lens group moves. A positive m.sup.th lens group is provided between the second and n.sup.th lens groups. The following conditions (1) and (2) are satisfied:
1.23<f1/fn<1.50  (1), and
1.20<fn/fm<1.60  (2),
wherein f1, fn and fm designate the focal lengths of the first, n.sup.th and m.sup.th lens groups, respectively, wherein n is a positive integer of 4 or greater, and m is a positive integer of 3 or greater.

Comprising a first lens group G1 having positive refractive power, disposed at the most object side, and an image side lens group disposed at a side closer to an image than the first lens group G1, upon zooming, at least a distance between the first lens group G1 and the image side lens group being varied, the image side lens group comprising a vibration reduction lens group GVR which is moved so as to have a component in a direction perpendicular to the optical axis and a focusing lens group GF which is moved along the optical axis upon focusing, thereby providing a variable magnification optical system which has a higher optical performance, an optical apparatus and a method for manufacturing a variable magnification optical system.