| 摘要 |
PURPOSE:To use such a lens barrel that focusing and control are performed by using mechanical power by a camera main body which has only electric contacts by providing a driving mechanism which performs focusing control and stop control in the lens barrel in the converter and providing a means for making a communication between the camera main body and lens barrel. CONSTITUTION:When the converter 22 is mounted, contacts 5 and 27a and contacts 15 and 25a come into contact with each other and the communication becomes possible; and a camera-side CPU 27 outputs stop control information and focus control information through the contact 27a according to the output information of a CCD 28. The CPU 26 of the converter 22 receives the control information through the contact 5 and performs rotation control over motors 10 and 12. An interlocking shaft 6 and a transmission member 11a rotate by the rotation of the motors 10 and 12, and then a holding lens barrel part 34 moves by the rotation of a gear 33 in the direction of the optical axis to move a focusing lens I to a focusing position. Further, a stop device 30 reduces a stop aperture by the movement of a stop interlocking member 24 so that proper exposure is obtained. |
