Image taking lens

1. An image taking lens comprising:

an aperture,

a first lens, and

a second lens, the aperture, the first lens and the second lens arranged in this order from an object side to an image side, wherein

the first lens has a positive power and a meniscus shape with a convex surface facing an object and a concave surface facing an image, the second lens has a positive power with a convex surface facing the image, and

the first lens and the second lens satisfy the following formulae (1) and (2):

0.40 <R 1 /R 2<0.65  (1)

0.33 <d 3 /F< 0.50  (2)

where

R 1 : radius of curvature of the convex surface of the first lens facing the object;

R 2 : radius of curvature of the concave surface of the first lens facing the image;

d 3 : center thickness of the second lens; and

F: focal length of the entire image taking lens.

2. The image taking lens in accordance with claim 1 , wherein the second lens is a biconvex lens.

3. The image taking lens in accordance with claim 1 , wherein R 1 /R 2 in formula (I) is larger than 0.50.

4. The image taking lens in accordance with any of claims 1 , 2 and 3 , further satisfying the following formulae (3) and (4):

0.60 <d 1 /d 2<1.80  (3)

0.40 <d 1 /d 3<0.85  (4)

where

d 1 : center thickness of the first lens; and

d 2 : distance between the surface of the first lens facing the image and the surface of the second lens facing the object.

5. The image taking lens in accordance with claim 1 , wherein F<2.00 mm.

6. The image taking lens in accordance with claim 1 , wherein d 1 <0.400 mm, where

d 1 : center thickness of the first lens.