Patent ID: 8773774

Claim:
A photographing lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power having an object-side surface being concave at a paraxial region thereof and an image-side surface being convex at a paraxial region thereof; a second lens element having positive refractive power; and a third lens element with negative refractive power made of plastic material and having an image-side surface being concave at a paraxial region thereof and being convex at a peripheral region thereof, wherein an object-side surface and the image-side surface of the third lens element are aspheric; wherein a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of the image-side surface of the first lens element is R2, an f-number of the photographing lens assembly is Fno, and the following relationships are satisfied: 1.0<( R 1 +R 2)/( R 1 −R 2)<2.5; and 1.5<Fno<3.0.