Photographing lens assembly, image capturing unit and electronic device

A photographing lens assembly comprising six lens elements, the six lens elements being, in order from an object side to an image side:

• a first lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof, wherein the object-side surface of the first lens element has at least one convex critical point in an off-axis region thereof;
• a second lens element;
• a third lens element having an image-side surface being convex in a paraxial region thereof;
• a fourth lens element having positive refractive power;
• a fifth lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof;
• and
• a sixth lens element having an image-side surface being concave in a paraxial region thereof, wherein the image-side surface of the sixth lens element has at least one convex critical point in an off-axis region thereof, and an object-side surface and the image-side surface of the sixth lens element are both aspheric;
• wherein a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of an image-side surface of the first lens element is R2, a central thickness of the sixth lens element is CT6, an axial distance between the fifth lens element and the sixth lens element is T56, an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, and the following conditions are satisfied:
• |R1/R2|<5.0;
• 1.60<CT6/T56<100;
• and
• 0.68<T12/T23<1.60.