Image capturing lens system, imaging device and mobile terminal

An image capturing lens system comprising, in order from an object side to an image side:

• a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof;
• a second lens element with refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof;
• a third lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof;
• and
• a fourth lens element with refractive power having an image-side surface being concave in a paraxial region thereof, wherein both of an object-side surface and the image-side surface of the fourth lens element are aspheric, and the image-side surface of the fourth lens element has at least one convex shape in an off-axis region thereof;
• wherein the image capturing lens system has a total of four lens elements with refractive power, any two lens elements of the image capturing lens system adjacent to each other have a space in a paraxial region between the two lens elements, a focal length of the second lens element is f2, a focal length of the third lens element is f3, an axial distance between the second lens element and the third lens element is T23, an axial distance between the first lens element and the second lens element is T12, a central thickness of the first lens element is CT1, a central thickness of the second lens element is CT2, a central thickness of the third lens element is CT3, and the following conditions are satisfied:
• |f3/f2|<1.25;
• 0.6<T23/T12<3.6;
• and
• 0.60<CT1/(CT2+CT3).