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;
• wherein 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 object-side surface of the second lens element is convex in a paraxial region thereof;
• the third lens element has positive refractive power;
• the image-side surface of the fifth lens element is convex in a paraxial region thereof;
• the object-side surface of the sixth lens element is convex in a paraxial region thereof;
• wherein at least one of the object-side surfaces and the image-side surfaces of the eight lens elements comprises at least one critical point in an off-axis region thereof;
• wherein an axial distance between the sixth lens element and the seventh lens element is T67, an axial distance between the seventh lens element and the eighth lens element is T78, an axial distance between the object-side surface of the first lens element and the image-side surface of the eighth lens element is TD, 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, an Abbe number of the sixth lens element is V6, and the following conditions are satisfied:
• 2.0<TD/(T67+T78)<6.3;
• 0.30<(R15+R16)/(R15−R16);
• 35.0<V6<60.0.