Eyepiece lens and imaging apparatus

1. An eyepiece lens consisting of:

a first lens having positive refractive power;

a second lens having negative refractive power;

a third lens having positive refractive power; and

a fourth lens having positive refractive power in this order from an observation object side, and the fourth lens is a meniscus lens with a convex surface facing an eye point side,

wherein the following conditional expression (1) is satisfied:

−3.5< f/fA< 0.0  (1), where

f: a focal length of an entire system, and

fA: a combined focal length of the first lens and the second lens,

wherein the following conditional expression (4) is satisfied:

−4.0< f/R 2 f<− 2.0  (4), where

R2f: a paraxial curvature radius of an object-side surface of the second lens.

2. The eyepiece lens, as defined in claim 1 , wherein the following conditional expression (2) is satisfied:

1.0< f/fB< 2.1  (2), where

fB: a combined focal length of the third lens and the fourth lens.

3. The eyepiece lens, as defined in claim 1 , wherein the following conditional expression (3) is satisfied:

−5.0< f/f 2<−1.2  (3), where

f2: a focal length of the second lens.

4. The eyepiece lens, as defined in claim 1 , wherein the following conditional expression (1-2) is satisfied:

−2.0< f/fA< 0.0  (1-2).

5. The eyepiece lens, as defined in claim 1 , wherein the following conditional expression (1-3) is satisfied:

−1.5< f/fA<− 0.5  (1-3).

6. The eyepiece lens, as defined in claim 2 , wherein the following conditional expression (2-2) is satisfied:

1.5< f/fB< 2.0  (2-2).

7. The eyepiece lens, as defined in claim 3 , wherein the following conditional expression (3-2) is satisfied:

−2.5< f/f 2<−1.5  (3-2).

8. The eyepiece lens, as defined in claim 1 , wherein the following conditional expression (4-2) is satisfied:

−3.5< f/R 2 f<− 2.5  (4-2).

9. An imaging apparatus comprising:

the eyepiece lens, as defined in claim 1 .