Photographing optical lens system, imaging apparatus and electronic device

A photographing optical lens system 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, each of the five lens elements having an object-side surface facing the object side and an image-side surface facing the image side:
• wherein the first lens element has positive refractive power, the object-side surface of the first lens element is convex in a paraxial region thereof, the image-side surface of the third lens element is convex in a paraxial region thereof, the object-side surface of the fourth lens element is convex in a paraxial region thereof, the fifth lens element has negative refractive power, the object-side surface of the fifth lens element is convex in a paraxial region thereof, and the image-side surface of the fifth lens element is concave in a paraxial region thereof;
• wherein a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of the image-side surface of the first lens element is R2, a curvature radius of the object-side surface of the second lens element is R3, a curvature radius of the image-side surface of the second lens element is R4, an axial distance between the object-side surface of the first lens element and the image-side surface of the fifth lens element along the optical path is Td, an axial distance between the image-side surface of the fifth lens element and an image surface along the optical path is BL, a focal length of the photographing optical lens system is f, a curvature radius of the object-side surface of the fifth lens element is R9, a curvature radius of the image-side surface of the fifth lens element is R10, a minimum among Abbe numbers of the lens elements of the photographing optical lens system is Vmin, and the following conditions are satisfied:
• −0.80<(R1+R2)/(R1−R2);
• 0<(R3+R4)/(R3−R4);
• Td/BL<2.0;
• Vmin <20;
• and
• 3.50<(f/R9)+(f/R10).