| 摘要 |
<p>A zoom eyepiece system (EL) comprises, in order from an eye point (EP) side, a first lens group (G1) having positive refractive power, a second lens group (G2) having positive refractive power, and a third lens group (G3) having negative refractive power. When the lens position state changes from a low-power end state to a high-power end state, the second lens group (G2) and the third lens group (G3) move along an optical axis in opposite directions. The second lens group (G2) includes, in order from the eye point (EP) side, a first lens (L3) having negative refractive power, a second lens (L4) having positive refractive power, and a third lens (L5) having positive refractive power. The third lens (L5) is an aspheric lens at least one surface of which is aspherically shaped.</p> |
