Photographing optical lens assembly including eight lenses of +−+−−++−, +−++−++−, ++++−++− or +−+−+−+−refractive powers, imaging apparatus and electronic device

A photographing optical lens assembly comprising eight lens elements, the eight 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, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element;
• each of the eight lens elements has an object-side surface towards the object side and an image-side surface towards the image side;
• wherein the first lens element has positive refractive power;
• the image-side surface of the second lens element is concave in a paraxial region thereof;
• the third lens element has positive refractive power;
• the image-side surface of the fourth lens element is convex in a paraxial region thereof;
• the seventh lens element has positive refractive power, the object-side surface of the seventh lens element is convex in a paraxial region thereof, the image-side surface of the seventh lens element is concave in a paraxial region thereof;
• the eighth lens element has negative refractive power, the image-side surface of the eighth lens element is concave in a paraxial region thereof;
• at least one of the object-side surface and the image-side surface of at least one of the eight lens elements comprises at least one critical point in an off-axis region thereof;
• wherein an Abbe number of the sixth lens element is V6, a curvature radius of the object-side surface of the eighth lens element is R15, a curvature radius of the image-side surface of the eighth lens element is R16, a focal length of the photographing optical lens assembly is f, a focal length of the third lens element is f3, a focal length of the seventh lens element is f7, a focal length of the eighth lens element is f8, and the following conditions are satisfied:
• 35.0<V6<60.0;
• 0.30<(R15+R16)/(R15−R16);
• −1.8<f/f8<−1.0;
• and
• 0.50<f3/f7<5.0.