Abstract: An optical system, a camera module, and an electronic device are disclosed. The optical system consists of six lenses having refractive power. The six lenses sequentially include a first and fifth lenses having positive refractive power, a second, fourth, and sixth lenses having negative refractive power. An object side surface and image side surface of the first lens, an object side surface of the third lens, an image side surface of the fourth lens, an object side surface of the fifth lens, and an object side surface of the sixth lens are convex near the optical axis. An image side surface of the second lens, an image side surface of the third lens, an object side surface of the fourth lens, and an image side surface of the sixth lens are concave near the optical axis.

Abstract: The present disclosure raltes to an optical system, an image acquisition module and an electronic device. The optical system includes, successively in order from an object side to an image side: a first lens having a positive refractive power, an object side surface thereof being convex near an optical axis, an image side surface thereof being convex near the optical axis; a second lens having a negative refractive power, an object side surface thereof being convex near the optical axis, an image side surface thereof being concave near the optical axis; a third lens having a negative refractive power, an image side surface thereof being convex near the optical axis; a fourth lens having a positive refractive power; a fifth lens having a negative refractive power. The optical system satisfies the following condition: 11 mm?f/tan(HFOV)?12.5 mm.