| 摘要 |
There is provided a lens module, including: a first lens having positive refractive power, an object-sided surface thereof being convex; a second lens having negative refractive power, an image-sided surface thereof being concave; a third lens having positive refractive power; a fourth lens having negative refractive power, an image-sided surface thereof being convex; and a fifth lens having negative refractive power, an image-sided surface thereof being concave, wherein the fourth lens satisfies Conditional Expression 1, f 4 f < - 3.0 [ Conditional Expression 1 ] where f is an overall focal distance of an optical system and f4 is a focal distance of the fourth lens. |
