Imaging lens and optical apparatus

1. An imaging lens consisting of, in order from a magnified side:

a first lens having a positive refractive power;

a second lens having a positive refractive power;

a third lens having a negative refractive power;

a fourth lens having a negative refractive power;

a fifth lens having a positive refractive power;

a sixth lens having a positive refractive power; and

a seventh lens having a positive refractive power,

wherein the following Conditional Expressions (1) and (2) are satisfied,

−50<ν d 2−ν d 3<−15  (1)

−80<ν d 4−ν d 5<−40  (2)

where νd2 is an Abbe number of the second lens in a d line,

νd3 is an Abbe number of the third lens in the d line,

νd4 is an Abbe number of the fourth lens in the d line,

νd5 is an Abbe number of the fifth lens in the d line, and

wherein the following Conditional Expression (3) is satisfied,

5<| f 45/ f 23|<30  (3),

where f45 is a composite focal length of the fourth lens and the fifth lens in the d line, and

f23 is a composite focal length of the second lens and the third lens in the d line.

2. The imaging lens according to claim 1 ,

wherein the following Conditional Expression (4) is satisfied,

6<| f 45/ f|< 40  (4)

where f45 is a composite focal length of the fourth lens and the fifth lens in the d line, and

f is a focal length of the whole system in the d line.

3. The imaging lens according to claim 1 ,

wherein the following Conditional Expression (5) is satisfied,

2< f 1 /f< 15  (5)

where f1 is a focal length of the first lens in the d line, and

f is a focal length of the whole system in the d line.

4. The imaging lens according to claim 1 ,

wherein the following Conditional Expression (6) is satisfied,

0.5<|( R 2+ R 1)/( R 2− R 1)|<1.2  (6)

where R2 is a curvature radius of a surface of the first lens on a reduced side, and

R1 is a curvature radius of a surface of the first lens on the magnified side.

5. The imaging lens according to claim 1 ,

wherein a surface of the sixth lens on the magnified side and a surface of the seventh lens on the magnified side have convex surfaces thereof directed toward the magnified side.

6. The imaging lens according to claim 1 ,

wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all single lenses.

7. The imaging lens according to claim 1 ,

wherein the following Conditional Expression (1-1) is satisfied,

−50<ν d 2−ν d 3<−20  (1-1).

8. The imaging lens according to claim 1 ,

wherein the following Conditional Expression (1-2) is satisfied,

−40<ν d 2−ν d 3<−22  (1-2).

9. The imaging lens according to claim 1 ,

wherein the following Conditional Expression (2-1) is satisfied,

−70<ν d 4−ν d 5<−42  (2-1).

10. The imaging lens according to claim 2 ,

wherein the following Conditional Expression (4-1) is satisfied,

7<| f 45/ f|< 30  (4-1).

11. The imaging lens according to claim 3 ,

wherein the following Conditional Expression (5-1) is satisfied,

2.5< f 1 /f< 10  (5-1).

12. The imaging lens according to claim 4 ,

wherein the following Conditional Expression (6-1) is satisfied,

0.6<|( R 2+ R 1)/( R 2− R 1)|<1.2  (6-1).

13. An optical apparatus comprising the imaging lens according to claim 1 .