CPC G02B 13/0045 (2013.01) [G02B 9/62 (2013.01); G02B 27/0025 (2013.01)] | 19 Claims |
1. 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, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, and each of the six lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;
wherein the first lens element has positive refractive power, the fifth lens element has negative refractive power, the image-side surface of the fifth lens element is concave in a paraxial region thereof, the sixth lens element has positive refractive power, the image-side surface of the sixth lens element is convex in a paraxial region thereof, and at least one of the object-side and the image-side surfaces of the six lens elements has at least one inflection point;
wherein a focal length of the photographing lens assembly is f, 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 i-th lens element is fi, an axial distance between the image-side surface of the sixth lens element and an image surface is BL, an axial distance between the object-side surface of the first lens element and the image-side surface of the sixth lens element is TD, a curvature radius of the object-side surface of the third lens element is R5, a curvature radius of the image-side surface of the third lens element is R6, and the following conditions are satisfied:
|f1|<|fi|, wherein i=2,3,4,5,6;
−1.0<f/f5<0;
0.1<BL/TD<0.25; and
−3.5<(R5+R6)/(R5−R6)<1.2.
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