Ultra-wide angle camera lens

An ultra-wide angle camera lens, comprising in sequence from an object side to an image side: a first lens (L1) having negative refractive power, an image side surface (S2) of the first lens (L1) being a concave surface; a second lens (L2) having negative refractive power, an image side surface (S4) of the second lens (L2) being a concave surface; a third lens (L3) having positive refractive power, an object side surface (S5) of the third lens (L3) being a convex surface; a fourth lens (L4) having positive refractive power, an image side surface (S8) of the fourth lens (L4) being a convex surface; and a fifth lens (L5) having negative refractive power, an image side surface (S10) of the fifth lens (L5) being a concave surface. The ultra-wide angle camera lens meets the following relational expression: -0.05focal length of the ultra-wide angle camera lens, f1 is the effective focal length of the first lens (L1), and ImgH is half the length of a diagonal of an effective pixel region on an imaging surface (S13). The ultra-wide angle camera lens meeting the configurations can achieve an ultra-wide angle. In addition, the system length of the ultra-wide angle camera lens can be shortened, thereby achieving miniaturization of the ultra-wide angle camera lens.