Patent ID: 8339718

Claim:
An image capturing optical lens system, in order from an object side to an image side comprising five lens elements with refractive power: a first lens element with positive refractive power; a second lens element with negative refractive power; a third lens element with negative refractive power having a concave object-side surface and at least one of the object-side surface and the image-side surface thereof being aspheric; a fourth lens element having at least one of the object-side surface and the image-side surface thereof being aspheric and made of plastic; and a fifth lens element having a concave image-side surface, at least one of the object-side surface and the image-side surface thereof being aspheric, at least one inflection point is formed on at least one of the object-side surface and the image-side surface thereof and made of plastic; 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, a curvature radius of the object-side surface of the fourth lens element is R7, a curvature radius of the image-side surface of the fourth lens element is R8, 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 second lens element and the third lens element is T23, and they satisfy the following relations: −5.0<( R 3 +R 4)/( R 3 −R 4)<−0.75; −5.0<( R 5 +R 6)/( R 5 −R 6)<−0.8; −5.3 <R 7 /R 8<6.5; and 0.1<( T 34 +T 45)/ T 23<1.8.