Image capturing optical lens system

An image capturing optical lens system comprising five lens elements with refractive power, in order from an object side to an image side:

• a first lens element with positive refractive power having a convex object-side surface;
• a second lens element having negative refractive power;
• a third lens element having refractive power;
• a fourth lens element with refractive power having a concave object-side surface and a convex image-side surface;
• and
• a fifth lens element with refractive power having a concave image-side surface, wherein an object-side surface and the image-side surface of the fifth lens element are aspheric, and the fifth lens element has at least one inflection point on the image-side surface thereof;
• wherein a refractive index of the fifth lens element is N5, a focal length of the image capturing optical lens system is f, a focal length of the fourth lens element is f4, and the following relationships are satisfied:
• 1.60<N5<1.75;
• and
• −1.0<f/f4<0.40.

An image capturing optical lens system comprising five lens elements with refractive power, in order from an object side to an image side:

• 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 object-side surface;
• a third lens element with positive refractive power having a convex object-side surface;
• a fourth lens element with refractive power having a convex image-side surface;
• and
• a fifth lens element with refractive power having a concave image-side surface, wherein an object-side surface and the image-side surface of the fifth lens element are aspheric, and the fifth lens element has at least one inflection point on the image-side surface thereof;
• wherein a refractive index of the fifth lens element is N5, a central thickness of the fifth lens element is CT5, a curvature radius of an object-side surface of the second lens element is R3, and the following relationships are satisfied:
• 1.60<N5<1.75;
• and
• −0.60<CT5/R3<−0.05.