Patent ID: 8693108

Claim:
An image capturing lens system comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power having a concave object-side surface and a convex image-side surface; a third lens element with refractive power; a fourth lens element with positive refractive power having a convex image-side surface, and both of the object-side and image-side surfaces thereof being aspheric; and a fifth lens element with refractive power having a concave image-side surface, both of the object-side and image-side surfaces thereof being aspheric, and at least one inflection point being formed on the image-side surface thereof; wherein a focal length of the image capturing lens system is f, a curvature radius of the image-side surface of the second lens element is R4, a focal length of the fourth lens element is f4, a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of the image-side surface of the first lens element is R2, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, an axial distance between the first lens element and the second lens element is T12, and they satisfy the following relations: −3.0 <f/R 4<−0.70; 0.40 <f/f 4<2.20; −2.5<( R 1 +R 2)/( R 1 −R 2)<−0.4; and 0.75<( T 34 +T 45)/ T 12<2.95.