Patent ID: 8717688

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 at a paraxial region; a second lens element with negative refractive power having a concave object-side surface at a paraxial region; a third lens element with positive refractive power having a convex object-side surface at a paraxial region; a fourth lens element with negative refractive power having a concave object-side surface at a paraxial region and a convex image-side surface at a paraxial region; and a fifth lens element with refractive power having a concave image-side surface at a paraxial region, the shape of the image-side surface changing from concave at the paraxial region thereof to convex while away from the paraxial region thereof, both of the object-side and image-side surfaces being aspheric; wherein a curvature radius of the object-side surface of the second lens element is R3, a curvature radius of the image-side surface of the second lens element is R4, a curvature radius of the object-side surface of the third lens element is R5, a curvature radius of the image-side surface of the third lens element is R6, and they satisfy the following relations: −3.5<( R 3 +R 4)/( R 3 −R 4)←0.2; and −3.5<( R 5 +R 6)/( R 5 −R 6)←0.3.