| 摘要 |
<p>Provided are a conversion lens unit and an image pick-up device that inhibit the adherence of debris, scratches, and user finger oil onto the optical surface of an incident luminous flux side and emission luminous flux side thereby enabling a high-quality image to be obtained. In a state where a housing (301) is retracted from above a master lens (101), a first opening (301a) and a second opening (301b) become blocked and thus a lens (La) that is closest to the object side of a conversion lens (302) is not exposed through the first opening (301a) and also a lens (Lb) closest to the image side is not exposed through the second opening (301b); therefore, scratching and contamination of the lenses can be inhibited.</p> |
