Bifocal camera

Abstract

Abstract PURPOSE:To minimize the movement extent and therefore obtain a lens barrel which operates easily and is compact in structure by mounting and demounting a conversion lens in an upper space including the optical path of a main lens for photography. CONSTITUTION:The lens barrel 2 is pressed and sunk toward the camera body, i.e. image frame 20 until it stops, and then an abutting piece 13c fitted atop of a lever 13 is pressed against an abutting material 21 provided to the camera body or its fixed part in the process of said depressing operation. When the sinking is completed, the lever 13 rotates counterclockwise against a torsion spring 8. A swinging member 7 is rotated clockwise to move onto an optical axis 3a and enter the space in the lens barrel 2. Namely, the conversion lens 6 moves away from the optical path of a main lens 3 for photography together with the swinging member 7 which holds the conversion lens and is stored.

Inventors

• 👤 Minoru Yamada
• 👤 穣 山田
• 👤 Koichi Gunji
• 👤 郡司　弘一
• 👤 Eiji Ito
• 👤 栄治 伊藤
• 👤 Yasutsugu Nakagawa
• 👤 中川　泰嗣

Bibliographic Details