Wide-angle imaging lens assembly

A wide-angle imaging lens assembly comprising, in order from an object side to an image side:

• a first lens element with negative refractive power having a concave image-side surface;
• a second lens element with negative refractive power having a concave image-side surface;
• a third lens element with positive refractive power;
• a fourth lens element with negative refractive power;
• and
• a fifth lens element with positive refractive power;
• wherein the wide-angle imaging lens assembly is further provided with a stop and an electronic sensor, the stop is disposed between the second lens element and the fourth lens element, the electronic sensor is disposed at an image plane for image formation of an object;
• wherein the two lens elements with refractive power closest to the object side are the first lens element and the second lens element;
• wherein the number of lens elements with refractive power does not exceed six;
• and wherein a focal length of the first lens element is f1, a focal length of the second lens element is f2, a distance on an optical axis between the stop and the electronic sensor is SL, a distance on the optical axis between an object-side surface of the first lens element and the electronic sensor is TTL, half of a diagonal length of an effective pixel area of the electronic sensor is ImgH, and they satisfy the relations:
• 0<f1/f2<2.00, 0.20<SL/TTL<0.85, TTL/ImgH<8.6.

A wide-angle imaging lens assembly comprising, in order from an object side to an image side:

• a first lens element with negative refractive power having a concave image-side surface;
• a second lens element with negative refractive power having a convex object-side surface and a concave image-side surface;
• a third lens element with positive refractive power;
• a fourth lens element with negative refractive power having a concave image-side surface;
• and
• a fifth lens element with positive refractive power;
• wherein the number of lens elements with refractive power is five;
• wherein the wide-angle imaging lens assembly is further provided with an electronic sensor for image formation of an object;
• and wherein a thickness of the fourth lens element on an optical axis is CT4, a radius of curvature of the image-side surface of the fourth lens element is R8, a focal length of the wide-angle imaging lens assembly is f, half of a diagonal length of an effective pixel area of the electronic sensor is ImgH, and they satisfy the relations:
• 0<CT4/R8<0.70, 0.30<f/ImgH<1.25.