| 摘要 |
A high-performance eyepiece is provided having a high-power magnification finder and a large pupil diameter even if it is used for a camera finder using a pentagonal mirror. The eyepiece includes, in order from the eyepoint end, a negative meniscus lens and a bifocal convex lens, which fulfills the following conditions:0.88<d1/d3<2.7and0.15<r1/f1<0.26where: d1 is the center thickness of the negative meniscus lens; d3 is the center thickness of the biconvex lens; r1 is the radius of curvature of the surface at the eyepoint end of the negative meniscus lens; and f1 is the focal length of the negative meniscus lens.
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