Patent ID: RE43592

Claim:
A photographic lens having only two lens elements, said photographic lens comprising, in order from the object side: a biconvex lens element having two aspherical surfaces; and a negative meniscus lens element having two aspherical surfaces and with its convex surface on the image side; wherein the following Conditions (1) and (2) are satisfied: 2·dd 2 <dd 1 Condition (1) R 3 >R 4 Condition (2) where, dd 1 is the on-axis distance between the object-side surface and the image-side surface of the biconvex lens element, dd 2 is the on-axis distance between the image-side surface of the biconvex lens element and the object-side surface of the negative meniscus lens element, R 3 is the absolute value of the radius of curvature of the image-side surface of the biconvex lens element, and R 4 is the absolute value of the radius of curvature of the object-side surface of the meniscus lens element.