| 摘要 |
PURPOSE:To vary the focal length of a strobe, by equipping a strobe part with a motor, and providing an element to a zoom lens part associating the strobe operatively and allowing the zoom lens part and a zoom strobe part to interlock. CONSTITUTION:A resistance B is incorporated in the zoom lens part A of a camera 1 and the zoom strobe part 3 is provided with the motor; and the zoom strobe part 3 is connected to the zoom lens part A by a wire 5 for the operative association between the both. The motor 6 is installed in the strobe part 3, and the resistance B is installed in the lens part A as means to interlock the lens part A to the strobe part 3. Then, the motor in corporating in the strobe part 3 is operated and the focal length changes automatically, when the focal length of lens is detected by the resistance B. The device for varying the focal length of the strobe 3 automatically is obtained, by incorporating the motor 6 in the strobe part 3 and varying the focal length of the zoom lens part A. |
