Compact photographing lens

A compact photographing lens, wherein;

• an aperture stop is arranged at a position closest to an object, a first lens group, a second lens group, and a third lens group are arranged sequentially from the object side, said first lens group is formed by arranging, sequentially from the object side, a first lens having a positive refracting power and a second lens having a negative refracting power and bonded to the first lens, the second lens being formed from a meniscus lens with a concave surface facing the object side, said second lens group is formed from only a third lens as a meniscus lens which has at least one aspherical refracting surface and a concave surface facing the object side, said third lens group is formed from only a fourth lens as a meniscus lens which has at least one aspherical refracting surface and a convex surface facing the object side, and said photographing lens satisfies conditions (1) to (5):
• 0.80<f/f1,2<1.00 (1)
• −0.10<f/f4<0.45 (2)
• 0.2<|f/r2-2|<1.6 (3)
• 2.9<|f/r3-1|<4.4 (4)
• 2.0<f/d1<2.9 (5)
• where
• f:
• focal length of entire system
• f1,2:
• combined focal length of first and second lenses
• f4:
• focal length of fourth lens
• r2-2:
• radius of curvature of image-side surface of second lens
• r3-1:
• radius of curvature of object-side surface of third lens
• d1:
• central thickness of first lens.