| 摘要 |
In a real-image type optical finder, a positive first lens group (objective lens group), a positive second lens group (relay lens group and image erecting optical system), and a positive third lens group (eyepiece lens group), are included in that order from the object side. The optical system satisfies the following condition (1):5.0<L/fII<7.0;(1)wherein: L represents the distance between the surface closest to the object side on the first lens group and the surface closest to the user's eye side on the third lens group; and fII represents the focal length of the second lens group.
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