| 摘要 |
The finder reduces a projection length by using the pairs of proprism, and improves a resolution by using plastic lens. The device is easily adopted to a small camera lens, compensates an image resolution, reduces a manufacturing cost, and varies a proprism length. The device includes a 1st lens which has a negative reflection ratio, the 2nd and 3rd lenses which have a positive reflection ratio, an object lens family which varies a position of 2nd lens, a prism family which has a movable prisms to reduce a projection length, and an eyepoint lens which has a positive reflection ratio and made by the plastic lens.
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