Patent ID: 11914106
Assignee: LARGAN PRECISION CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 16:
17. A photographing optical lens assembly for telephoto comprising five lens elements, the five lens elements being, in order from an object side to an image side along an optical axis:
a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element; each of the five lens elements having an object-side surface facing towards the object side and an image-side surface facing towards the image side;
wherein the first lens element with positive refractive power has the object-side surface being convex in a paraxial region thereof; at least one of the object-side surface and the image-side surface of at least one of the lens elements is aspheric and comprises at least one inflection point;
wherein the photographing optical lens assembly has a total of five lens elements, there is an air space between every two lens elements of the first lens element, the second lens element, the third lens element, the fourth lens element and the fifth lens element that are adjacent to each other; a sum of axial distances between each of adjacent lens elements of the photographing optical lens assembly is ΣAT, an axial distance between the image-side surface of the fifth lens element and an image surface is BL, a refractive power of the first lens element is P1, a refractive power of the second lens element is P2, a refractive power of the third lens element is P3, a refractive power of the fourth lens element is P4, a half of a maximum field of view of the photographing optical lens assembly is HFOV, a focal length of the first lens element is f1, a central thickness of the second lens element is CT2, and the following conditions are satisfied:

0<ΣAT/BL<0.50;

|P4|<|P1|;

|P3|<|P2|;

|tan(HFOV)|≤0.29; and

0<f1/CT2<5.50.