Patent ID: 8817386

Claim:
An image capturing lens system, in order from an object side to an image side comprising: 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 image-side surface; a plastic third lens element with refractive power having a concave object-side surface and a convex image-side surface, both the object-side and image-side surfaces thereof being aspheric; and a plastic fourth lens element with negative refractive power having a concave image-side surface, both the object-side and image-side surfaces thereof being aspheric, and at least one inflection point is formed on at least one of the object-side and image-side surfaces thereof, wherein a total number of lens elements with refractive power of the image capturing lens system is four and all the four lens elements with refractive power are non-cemented lenses; wherein the image capturing lens system comprises a stop positioned between the first lens element and the second lens element; wherein an axial distance between the third lens element and the fourth lens element is T 34 , a central thickness of the third lens element is CT 3 , a central thickness of the fourth lens element is CT 4 , an axial distance between the object-side surface of the first lens element and the stop is Ds, an axial distance between the object-side surface of the first lens element and the image-side surface of the second lens element is D 12 , and they satisfy the following relations: 1.1 <T 34 /CT 3<3.3; 0.8 <T 34 /CT 4<3.5; and 0.35 <Ds/D 12<0.9.