CPC G02B 13/18 (2013.01) [G02B 9/64 (2013.01); G02B 13/0045 (2013.01)] | 25 Claims |
1. A photographing optical lens assembly comprising seven lens elements, the seven 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 and a seventh lens element;
wherein the first lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof, the third lens element with positive refractive power has an image-side surface being convex in a paraxial region thereof, the fourth lens element has positive refractive power, the seventh lens element has an image-side surface being concave in a paraxial region thereof, the image-side surface of the seventh lens element has at least one convex critical point in an off-axis region thereof, and an absolute value of a curvature radius of an image-side surface of the fifth lens element is larger than an absolute value of a curvature radius of an image-side surface of the first lens element;
wherein an axial distance between the object-side surface of the first lens element and an image surface is TL, a maximum image height of the photographing optical lens assembly is ImgH, a curvature radius of the object-side surface of the first lens element is R1, the curvature radius of the image-side surface of the first lens element is R2, and the following conditions are satisfied:
TL/ImgH<2.4; and
−1.50<(R1+R2)/(R1−R2)<0.75.
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