Optical image lens assembly and electronic device

An optical image lens assembly comprising five lens elements, the five lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element, and each of the five lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;

• wherein the object-side surface of the first lens element is convex in a paraxial region thereof, the second lens element has positive refractive power, the image-side surface of the fifth lens element is concave in a paraxial region thereof, and the image-side surface of the fifth lens element has at least one convex shape in an off-axial region thereof;
• and
• wherein a distance along an optical axis between the image-side surface of the fifth lens element and an image surface is BL, a distance along the optical axis between the object-side surface of the first lens element and the image-side surface of the fifth lens element is TD, an Abbe number of the fifth lens element is V5, and the following conditions are satisfied:
• 0.85<BL/TD<5.0;
• and
• 8.0<V5<28.0.

An optical image lens assembly comprising five lens elements, the five lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element, and each of the five lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;

• wherein the first lens element has positive refractive power, the second lens element has positive refractive power, the third lens element has negative refractive power, the fourth lens element has positive refractive power, the fifth lens element has positive refractive power, the object-side surface of the fifth lens element is convex in a paraxial region thereof, the image-side surface of the fifth lens element is concave in a paraxial region thereof, and the image-side surface of the fifth lens element has at least one convex shape in an off-axial region thereof;
• and
• wherein a distance along an optical axis between the image-side surface of the fifth lens element and an image surface is BL, a distance along the optical axis between the object-side surface of the first lens element and the image-side surface of the fifth lens element is TD, and the following condition is satisfied:
• 0.75<BL/TD<5.0.