Abstract: A lens assembly includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens. The first lens is with positive refractive power. The second lens is with negative refractive power. The third lens is with positive refractive power. The fourth lens is a meniscus lens and includes a concave surface facing the object side and a convex surface facing the image side. The fifth lens includes a concave surface facing the image side. The first lens and the third lens are made of the same material. An Abbe number of the first lens, an Abbe number of the third lens and an Abbe number of the fifth lens are greater than an Abbe number of the second lens. The fourth lens satisfies: 0.66?f4/f?0.7 wherein f is an effective focal length of the lens assembly and f4 is an effective focal length of the fourth lens.

Abstract: A wide-angle lens comprises sequentially from an object side to an image side along an optical axis a first lens, a second lens, a stop and a third lens. The first lens is a biconcave lens and with negative refractive power. The second lens is a convex-concave lens with positive refractive power and includes a convex surface facing the object side and concave surface facing the image side. The third lens is with positive refractive power and includes a convex surface facing the image side. The wide-angle lens satisfies the following condition: 2.9<DL1DL2<3.1 wherein DL1 is an effective diameter of the first lens and DL2 is an effective diameter of the second lens.

Abstract: A lens assembly comprises sequentially from an object side to an image side along an optical axis a first lens, a second lens, a stop, a third lens, a fourth lens and a fifth lens. The first lens is a biconvex lens with positive refractive power. The second lens is a meniscus lens with negative refractive power and the convex surface of second lens faces the object side. The third lens is a meniscus lens with negative refractive power and the convex surface of third lens faces the object side. The fourth lens is a meniscus lens with positive refractive power and the concave surface of fourth lens faces the object side. The fifth lens is a biconcave lens with negative refractive power. The lens assembly satisfies the following condition: 1.10<DL1/DST<10.90, wherein DL1 is an effective diameter of the first lens and DST is an effective diameter of the stop.

Abstract: A lens assembly includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens is with refractive power and includes a convex surface facing the object side. The second and third lenses are with refractive power. The fourth lens is with refractive power and includes a convex surface facing the image side. The fifth lens is with negative refractive power. The lens assembly satisfies: 0?f1/f2?6, (Vd1+Vd2)/2>40, Vd1?Vd3, Vd2?Vd3, Vd5?Vd3 wherein f1 is an effective focal length of the first lens, f2 is an effective focal length of the second lens and Vd1, Vd2, Vd3, Vd5 are Abbe numbers of the first, second, third, fifth lenses.

Abstract: A lens assembly includes five lenses, a second lens, a third lens, a fourth lens and a fifth lens. The first lens is with positive refractive power. The second lens is with negative refractive power. The third lens is with positive refractive power. The fourth lens is a concave-convex lens and includes a concave surface facing the object side and a convex surface facing the image side. The fifth lens includes a concave surface facing the image side. The first lens and the third lens are made of the same material and an Abbe number of the first lens is the same as an Abbe number of the third lens. An Abbe number of the first lens, an Abbe number of the third lens and an Abbe number of the fifth lens are greater than an Abbe number of the second lens.

Abstract: A lens assembly includes a fifth lens, a first lens, a second lens, a third lens and a fourth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The second lens is a biconcave lens. The third lens is a biconvex lens and made of glass material. The fourth lens includes a concave surface facing the object side.