an optical lens system having a small f number , a wide angle of view , a short total length and a low manufacturing cost , includes , in order from an object side to an image side : a stop ; a first lens element with a positive refractive power ; a meniscus second lens element with a negative refractive power ; a third lens element with a positive refractive power ; a fourth lens element with a positive refractive power ; a fifth lens element with a negative refractive power , the optical lens system has a focal length of f , the first lens element has a focal length f1 , the third lens element has a focal length f3 , the fourth lens element has a focal length f4 , the fifth lens element has a focal length f5 , and they satisfy the conditions : 0 . 4 & lt ; f4 / f & lt ; 1 . 0 ; − 0 . 8 & lt ; f5 / f & lt ;− 0 . 4 ; and f1 / f & lt ; 1 . 2 & lt ; f3 / f .