An embodiment provides an imaging lens comprising first to third lens groups arranged sequentially from an object side to an image side and having refractive power, wherein the distances of the second lens group and the third lens group from the first lens group are variable such that a tele mode having a narrow angle of view and a wide mode having a wide angle of view can be implemented, the EFL in the tele mode is no more than 2.5 times the EFL in the wide mode, 2<F.sub.number<5 and 15 mm<TTL40 mm.

A zoom lens includes, in order from an object side to an image side, a first lens unit having negative refractive power, a second lens unit having positive refractive power, and a rear group including one or more lens units. The first lens unit does not move during zooming, and distances between adjacent lens units change during zooming. The first lens unit includes two or more negative lenses. A predetermined condition is satisfied.

Various embodiments disclosed herein include zoom lens assemblies, as well as cameras and devices that incorporate these zoom lens assemblies. The zoom lens assemblies described herein include three lens groups, the first of which includes a light-folding element such as a prism. The second and third lens groups are moveable relative to the first lens group and relative to each other to change the focal length of the camera.

An optical imaging system includes a first lens group that can move in an optical direction and has negative refractive power; a second lens group that can move in the optical direction and has positive refractive power; and a third lens group that can move in the optical direction and has negative refractive power. The first lens group, the second lens group, and the third lens group include seven lenses in total, and at least one of the seven lenses includes an aspherical surface.

An optical imaging system includes a first lens group, a second lens group, and a third lens group, sequentially arranged from an object side, wherein the first lens group includes two lenses having negative and positive refractive power, the second lens group includes a plurality of lenses, and the third lens group includes two lenses having negative and positive refractive power.

An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens disposed sequentially from an object side. The optical imaging system satisfies 2.0<L3R2/f<0.5 and 3.0<f/IMG_HT<4.0, where L3R2 is a radius of curvature of an image-side surface of the third lens, f is a focal length of the optical imaging system, and IMG_HT is half a diagonal length of an imaging plane.

An optical imaging system includes a first lens group that can move in an optical direction and has negative refractive power; a second lens group that can move in the optical direction and has positive refractive power; and a third lens group that can move in the optical direction and has negative refractive power. The first lens group, the second lens group, and the third lens group include seven lenses in total, and at least one of the seven lenses includes an aspherical surface.

An optical imaging system includes a first lens group that can move in an optical direction and has negative refractive power; a second lens group that can move in the optical direction and has positive refractive power; and a third lens group that can move in the optical direction and has negative refractive power. The first lens group, the second lens group, and the third lens group include seven lenses in total, and at least one of the seven lenses includes an aspherical surface.

An optical system has, sequentially from an object side to an image side, a first lens group including at least one lens and having a negative refractive power, a second lens group including at least one lens and having a positive refractive power, and a third lens group including at least one lens and having a negative refractive power. During focusing, distances from the first lens group and the third lens group to an imaging plane on an optical axis are fixed, and the second lens group is movable along the optical axis.

Provided are an optical lens assembly and an electronic apparatus having the same. The optical lens assembly having a plurality of lenses arranged from an object side toward an image side where an image sensor is disposed, includes a bending unit configured to reflect light input from the object side in a first direction toward a second direction; and a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having negative refractive power, which are arranged in the second direction in order from the bending unit toward the image side. The first lens group includes a first lens having negative refractive power and disposed adjacent to the bending unit and a second lens having positive refractive power.