OCULAR OPTICAL SYSTEM

Japanese Patent JP2023083485

A

To provide an ocular optical system EL which offers a high observation magnification and good optical performance, and to provide an image capturing device having the same.SOLUTION: An ocular optical system EL provided herein comprises a first lens with positive refractive power, a meniscus-shaped second lens with negative refractive power having a concave surface on the observed object side, a third lens with positive refractive power, and a meniscus-shaped fourth lens with positive refractive power having a concave surface on the observed object side, arranged in order from the observed object side, and satisfies conditions expressed as: 1.38