Image pickup lens and image pickup apparatus

1. An image pickup lens, comprising the following disposed from an object side in the order listed below:

a first lens which is a meniscus lens having a negative power and a concave surface on an image side;

a second lens having an aspherical surface on each of the object and image sides and a negative power adjacent to an optical axis, the object side surface having a concave shape adjacent to the optical axis and the image side surface having a convex shape adjacent to the optical axis;

a third lens having an aspherical surface on each of the object and image sides and a positive power adjacent to the optical axis, the image side surface having a convex shape adjacent to the optical axis;

an aperture; and

a fourth lens having an aspherical surface on each of the object and image sides and a positive power adjacent to the optical axis, the object side surface having a convex shape adjacent to the optical axis and the image side surface having a convex shape adjacent to the optical axis,

wherein the image pickup lens satisfies Conditional Expression (5) given below when a combined focal length of the third lens and the fourth lens is taken as f 34 and a distance from a surface apex of the object side surface of the first lens to an image plane is taken as L

4.0< L/f 34<8.0  (5).

2. The image pickup lens of claim 1 , wherein the image pickup lens satisfies Conditional Expression (1) given below when a focal length of the first lens is taken as fl and a focal length of the entire system is taken as f

−12.0< f 1 /f<− 5.0  (1).

3. The image pickup lens of claim 1 , wherein the image pickup lens satisfies Conditional Expression (2) given below when a distance between the first lens and the second lens on the optical axis is taken as d 2 and a distance from a surface apex of the object side surface of the first lens to an image plane is taken as L

0.15< d 2 /L< 0.25  (2).

4. The image pickup lens of claim 1 , wherein the image pickup lens satisfies Conditional Expression (3) given below when a distance between the second lens and the third lens on the optical axis is taken as d 4 and a distance from a surface apex of the object side surface of the first lens to an image plane is taken as L

0.02< d 4 /L< 0.05  (3).

5. The image pickup lens of claim 1 , wherein the image pickup lens satisfies Conditional Expression (4) given below when a focal length of the second lens is taken as f 2 and a focal length of the third lens is taken as f 3

−1.2< f 2 /f 3<−0.1  (4).

6. An image pickup lens, comprising the following disposed from an object side in the order listed below:

a first lens which is a meniscus lens having a negative power and a concave surface on an image side;

a second lens having an aspherical surface on each of the object and image sides and a negative power adjacent to an optical axis, the object side surface having a concave shape adjacent to the optical axis and the image side surface having a convex shape adjacent to the optical axis;

a third lens having an aspherical surface on each of the object and image sides and a positive power adjacent to the optical axis, the image side surface having a convex shape adjacent to the optical axis;

an aperture; and

a fourth lens having an aspherical surface on each of the object and image sides and a positive power adjacent to the optical axis, the object side surface having a convex shape adjacent to the optical axis and the image side surface having a convex shape adjacent to the optical axis,

wherein the object side surface of the third lens has a convex shape adjacent to the optical axis and the image pickup lens satisfies Conditional Expression (6A) given below when a radius of paraxial curvature of the image side surface of the second lens is taken as r 4 and a radius of paraxial curvature of the object side surface of the third lens is taken as r 5

−5.0< r 5 /r 4<0.0  (6A).

7. An image pickup lens, comprising the following disposed from an object side in the order listed below:

a first lens which is a meniscus lens having a negative power and a concave surface on an image side;

a second lens having an aspherical surface on each of the object and image sides and a negative power adjacent to an optical axis, the object side surface having a concave shape adjacent to the optical axis and the image side surface having a convex shape adjacent to the optical axis;

a third lens having an aspherical surface on each of the object and image sides and a positive power adjacent to the optical axis, the image side surface having a convex shape adjacent to the optical axis;

an aperture; and

a fourth lens having an aspherical surface on each of the object and image sides and a positive power adjacent to the optical axis, the object side surface having a convex shape adjacent to the optical axis and the image side surface having a convex shape adjacent to the optical axis,

wherein the object side surface of the third lens has a concave shape adjacent to the optical axis and the image pickup lens satisfies Conditional Expression (6B) given below when a radius of paraxial curvature of the image side surface of the second lens is taken as r 4 and a radius of paraxial curvature of the object side surface of the third lens is taken as r 5

4.0< r 5 /r 4<8.0  (6B).

8. The image pickup lens of claim 1 , wherein an Abbe number of the material of the first lens with respect to d-line is not less than 40, an Abbe number of the material of the second lens with respect to d-line is not less than 50, an Abbe number of the material of the third lens with respect to d-line is not greater than 40, and an Abbe number of the material of the fourth lens with respect to d-line is not less than 50.

9. The image pickup lens of claim 1 , wherein the image pickup lens has a total angle of view greater than 200° .

10. An image pickup apparatus comprising the image pickup lens of claim 1 .

11. The image pickup lens of claim 6 , wherein the image pickup lens satisfies Conditional Expression (1) given below when a focal length of the first lens is taken as f 1 and a focal length of the entire system is taken as f

−12.0< f 1 /f<− 5.0  (1).

12. The image pickup lens of claim 6 , wherein the image pickup lens satisfies Conditional Expression (2) given below when a distance between the first lens and the second lens on the optical axis is taken as d 2 and a distance from a surface apex of the object side surface of the first lens to an image plane is taken as L

0.15< d 2 /L< 0.25  (2).

13. The image pickup lens of claim 6 , wherein the image pickup lens satisfies Conditional Expression (3) given below when a distance between the second lens and the third lens on the optical axis is taken as d 4 and a distance from a surface apex of the object side surface of the first lens to an image plane is taken as L

0.02< d 4 /L< 0.05  (3).

14. The image pickup lens of claim 6 , wherein the image pickup lens satisfies Conditional Expression (4) given below when a focal length of the second lens is taken as f 2 and a focal length of the third lens is taken as f 3

−1.2< f 2 /f 3<−0.1  (4).

15. The image pickup lens of claim 6 , wherein an Abbe number of the material of the first lens with respect to d-line is not less than 40, an Abbe number of the material of the second lens with respect to d-line is not less than 50, an Abbe number of the material of the third lens with respect to d-line is not greater than 40, and an Abbe number of the material of the fourth lens with respect to d-line is not less than 50.

16. The image pickup lens of claim 6 , wherein the image pickup lens has a total angle of view greater than 200° .

17. An image pickup apparatus comprising the image pickup lens of claim 6 .

18. The image pickup lens of claim 7 , wherein the image pickup lens satisfies Conditional Expression (1) given below when a focal length of the first lens is taken as fl and a focal length of the entire system is taken as f

−12.0< f 1 /f<− 5.0  (1).

19. The image pickup lens of claim 7 , wherein the image pickup lens satisfies Conditional Expression (2) given below when a distance between the first lens and the second lens on the optical axis is taken as d 2 and a distance from a surface apex of the object side surface of the first lens to an image plane is taken as L

0.15< d 2 /L< 0.25  (2).

20. The image pickup lens of claim 7 , wherein the image pickup lens satisfies Conditional Expression (3) given below when a distance between the second lens and the third lens on the optical axis is taken as d 4 and a distance from a surface apex of the object side surface of the first lens to an image plane is taken as L

0.02< d 4 /L< 0.05  (3).

21. The image pickup lens of claim 7 , wherein the image pickup lens satisfies Conditional Expression (4) given below when a focal length of the second lens is taken as f 2 and a focal length of the third lens is taken as f 3

−1.2< f 2 /f 3<−0.1  (4).

22. The image pickup lens of claim 7 , wherein an Abbe number of the material of the first lens with respect to d-line is not less than 40, an Abbe number of the material of the second lens with respect to d-line is not less than 50, an Abbe number of the material of the third lens with respect to d-line is not greater than 40, and an Abbe number of the material of the fourth lens with respect to d-line is not less than 50.

23. The image pickup lens of claim 7 , wherein the image pickup lens has a total angle of view greater than 200° .

24. An image pickup apparatus comprising the image pickup lens of claim 7 .