Optical photographing lens assembly, imaging apparatus and electronic device

An optical photographing lens assembly comprising seven lens elements, the seven 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 and a seventh lens element;
• wherein the first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof;
• the third lens element has positive refractive power;
• the seventh lens element has an image-side surface being concave in a paraxial region thereof and comprising at least one convex shape in an off-axis region thereof, and an object-side surface and the image-side surface of the seventh lens element are aspheric;
• wherein a focal length of the first lens element is f1, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, a focal length of the fifth lens element is f5, a focal length of the sixth lens element is f6, a focal length of the seventh lens element is f7, a focal length of the optical photographing lens assembly is f, a curvature radius of the object-side surface of the seventh lens element is R13, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, and the following conditions are satisfied:
• |f3/f1|≤1.0;
• |f3/f2|≤1.0;
• |f3/f4|≤1.0;
• |f3/f5|≤1.0;
• |f3/f6|≤1.0;
• |f3/f7|≤1.0;
• 0.20≤f/R13;
• and
• T34/T45≤8.0.