Photographing lens assembly comprising eight lenses of +−++−−+−, +−−++−+−, +−−+−−+−, +−−−+−+− or +−−+−++− refractive powers, image capturing unit and electronic device

A photographing lens assembly comprising eight lens elements, the eight lens elements being, in order from an object side to an image side, 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 the first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof, the sixth lens element has an image-side surface being concave in a paraxial region thereof, the seventh lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof and has an image-side surface being concave in a paraxial region thereof, the eighth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, and the image-side surface of the eighth lens element has at least one critical point in an off-axis region thereof;
• wherein a central thickness of the first lens element is CT1, a maximum value among central thicknesses of the second through eighth lens elements is MaxCT28, a curvature radius of the image-side surface of the seventh lens element is R14, a curvature radius of the object-side surface of the eighth lens element is R15, an axial distance between an object-side surface of the third lens element and an image-side surface of the fifth lens element is Dr5r10, an axial distance between an object-side surface of the sixth lens element and the image-side surface of the eighth lens element is Dr11r16, and the following conditions are satisfied:
• 1.0<CT1/MaxCT28;
• R14/R15<1.20;
• and
• Dr5r10/Dr11r16<1.0.