Abstract: This application discloses a long-focus lens, a camera module, and an electronic device. The long-focus lens includes a first lens assembly, a second lens assembly, and a third lens assembly that are arranged from an object side to an image side. The first lens assembly and the third lens assembly are fixed lens assemblies, and the second lens assembly is a focusing lens assembly. In a focusing process in which the long-focus lens is switched from a long shot to a close-up, the second lens assembly moves toward the object side along an optical axis, a combined focal length of the first lens assembly and the second lens assembly decreases, and a combined focal length of the second lens assembly and the third lens assembly decreases. The foregoing long-focus lens has a strong focusing capability and high imaging quality.

Abstract: A lens group is provided, which includes a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), and a fifth lens (L5) that are sequentially arranged from an object side to an image side, and a relative refractive index temperature coefficient ? of at least one lens meets: ?9×10?5???9×10?5. A temperature drift coefficient of the lens group falls within a small range, a temperature effect of the lens group is low, and a defocus phenomenon generated because the lens group changes with a temperature is weak. According to the application, a design difficulty of a voice coil motor in a lens can be reduced and user experience is improved.

Abstract: Provided are a camera lens assembly and a portable electronic device. The camera lens assembly includes first, second, third, fourth, fifth and sixth lenses from an object side to an image side. The first lens has a positive focal power and a convex object side surface. The second lens has a focal power and a symmetrically-transitional image side surface from concave to convex along a direction vertical to an optical axis, in which the image side surface is concave close to the optical axis and convex away from the optical axis. The third lens has a focal power and a convex object side surface. The fourth lens has a positive focal power and a convex image side surface. The fifth lens is of a focal power. The sixth lens has a negative focal power, a convex object side surface and a concave image side surface.

Abstract: Provided are a camera lens assembly and a portable electronic device. The camera lens assembly includes first, second, third, fourth, fifth and sixth lenses from an object side to an image side. The first lens has a positive focal power and a convex object side surface. The second lens has a focal power and a symmetrically-transitional image side surface from concave to convex along a direction vertical to an optical axis, in which the image side surface is concave close to the optical axis and convex away from the optical axis. The third lens has a focal power and a convex object side surface. The fourth lens has a positive focal power and a convex image side surface. The fifth lens is of a focal power. The sixth lens has a negative focal power, a convex object side surface and a concave image side surface.