Optical imaging lens

An optical imaging lens comprising a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, and an eighth lens element sequentially from an object side to an image side along an optical axis, each of the first, second, third, fourth, fifth, sixth, seventh, and eighth lens element having an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:

• the second lens element has negative refracting power;
• a periphery region of the object-side surface of the third lens element is concave;
• a periphery region of the image-side surface of the fourth lens element is convex;
• the fifth lens element has negative refracting power;
• a periphery region of the image-side surface of the fifth lens element is convex;
• an optical axis region of the object-side surface of the sixth lens element is concave;
• lens elements of the optical imaging lens having refracting power are composed of the eight lens elements described above;
• an image height of the optical imaging lens is represented by ImgH;
• a distance from the object-side surface of the first lens element to an image plane along the optical axis is represented by TTL;
• and
• the optical imaging lens satisfies an inequality:
• TTL/ImgH≤1.500.