3 the radius of curvature of the image side surface 112 of the second lens element 110 is r 4 and they satisfy the relations r 1 r 2 0 55 r 3 r 4 0 81 in the first embodiment of the present photographing optical lens assembly the refractive index of the first lens element 100 is n 1 and it satisfies the relation n 1 1 543 in the first embodiment of the present photographing optical lens assembly the abbe number of the first lens element 100 is v 1 the abbe number of the second lens element 110 is v 2 and they satisfy the relations v 1 56 5 v 1 u2212 v 2 0 0 in the first embodiment of the present photographing optical lens assembly the on axis spacing between the first lens element 100 and the second lens element 110 is t 12 the focal length of the photographing optical lens assembly is f and they satisfy the relation t 12 f 0 14 in the first embodiment of the present photographing optical lens assembly the on axis thickness of the first lens element 100 is ct 1 the on axis thickness of the second lens element 110 is ct 2 and they satisfy the relation ct 2 ct 1 1 62 in the first embodiment of the present photographing optical lens assembly the photographing optical lens assembly further comprises an electronic sensor on which an object to be photographed is imaged the total track length of the photographing optical lens assembly is ttl the maximum image height of the.