this invention provides an optical image capturing lens system comprising : a negative first lens element having a convex object - side surface and a concave image - side surface at the paraxial region ; a positive second lens element ; a negative third lens element ; a positive fourth lens element having a convex image - side surface at the paraxial region ; and a negative plastic fifth lens element having a convex object - side surface at the paraxial region as well as a concave at the paraxial region and convex at the peripheral region image - side surface , at least one of the object - side and image - side surfaces being aspheric . the optical image capturing lens system of the present invention effectively increases the angle of view to a proper range and suppresses the distortion . in addition , the present invention has a tighter arrangement of the lens elements and a smaller back focal length , and therefore is more appropriate for the compact device .