Image pickup lens and image pickup apparatus
View Patent ↗Disclosed is an image pickup lens having the following disposed from an object side in the order listed below: a first lens having a negative power and a meniscus shape with a concave surface on an image side; a second lens having a positive power; a third lens having a negative power; a fourth lens having a positive power; a fifth lens having a positive power; and a sixth lens having a negative power and a meniscus shape with a concave surface on the object side. The image pickup lens satisfies Conditional Expression (1) given below when a focal length of the first lens is taken as f1 and a focal length of the second lens is taken as f2 −3.0< f 1 /f 2<−1.6 (1).
1. An image pickup lens, comprising the following disposed from an object side in the order listed below:
a first lens having a negative power and a meniscus shape with a concave surface on an image side;
a second lens having a positive power;
a third lens having a negative power;
a fourth lens having a positive power;
a fifth lens having a positive power; and
a sixth lens having a negative power and a meniscus shape with a concave surface on the object side,
wherein the lens satisfies Conditional Expression (1) given below when a focal length of the first lens is taken as f1 and a focal length of the second lens is taken as f2
−3.0 <f 1 /f 2<−1.6 (1).
2. The image pickup lens of claim 1 , wherein the lens satisfies Conditional Expression (2) given below when an Abbe number of the first lens with respect to d-line is taken as νd1 and an Abbe number of the second lens with respect to d-line is taken as νd2
15.0 <νd 1 −νd 2<30.0 (2).
3. The image pickup lens of claim 1 , wherein the lens satisfies Conditional Expression (3) given below when a focal length of the entire lens system is taken as f and a combined focal length from the third to sixth lenses is taken as f3456
1.0 <f 3456 /f (3).
4. The image pickup lens of claim 1 , wherein the lens satisfies Conditional Expression (4) given below when a focal length of the entire lens system is taken as f and a focal length of the fifth lens is taken as f5
0.5 <f 5 /f< 1.5 (4).
5. The image pickup lens of claim 1 , wherein the lens satisfies Conditional Expression (5) given below when a focal length of the entire lens system is taken as f and a focal length of the sixth lens is taken as f6
−1.5 <f 6 /f<− 0.6 (5).
6. The image pickup lens of claim 1 , wherein the lens satisfies Conditional Expression (6) given below when a focal length of the entire lens system is taken as f and a focal length of the third lens is taken as f3
−1.2 <f 3 /f<− 0.3 (6).
7. The image pickup lens of claim 1 , wherein the lens satisfies Conditional Expression (7) given below when a focal length of the entire lens system is taken as f and a radius of curvature of an image side surface of the fourth lens is taken as R 9
−1.0 <R 9 /f<− 0.5 (7).
8. The image pickup lens of claim 1 , wherein the lens satisfies Conditional Expression (8) given below when a focal length of the fourth lens is taken as f4 and a focal length of the fifth lens is taken as f5
0.5 <f 4 /f 5<1.5 (8).
9. The image pickup lens of claim 1 , wherein Abbe numbers of the fourth and fifth lenses with respect to d-line are not less than 35 and an Abbe number of the sixth lens with respect to d-line is not greater than 30.
10. The image pickup lens of claim 1 , wherein an Abbe number of the first lens with respect to d-line is not less than 40.
11. The image pickup lens of claim 1 , wherein an aperture is disposed between the second and third lenses.
12. The image pickup lens of claim 1 , wherein an aperture is disposed between the third and fourth lenses.
13. An image pickup apparatus, comprising the image pickup lens of claim 1 .