| 摘要 |
PURPOSE:To set up the focal position of one of three kinds of distance, near, middle and far, photographing lenses automatically and precisely by detecting the distance of a subject in accordance with the distance information of the subject through the sensor array of a distance measuring mechanism. CONSTITUTION:A control part 38 makes electric current flows into one way, repels the 1st part A of an armature 26 from the 3rd part C of a york 32, attracts the 2nd part B of the armature 26 to the 4th part D of the york 32 and sets the armature 26 in the 1st rotation position. On the other hand, the control part 38 makes current flow to the other direction, attracts the 1st part A of the armature 26 to the 3rd part C of the york 32, repels the 2nd part B of the armature 26 from the 4th part D of the york 32, and sets the armatue to the 2nd rotation position. Or, without current supply, the control part 38 attracts the 1st and 2nd parts A, B of the armature 26 into the 3rd and 4th parts C, D of the york 32 and sets the armature 26 in the 3rd rotating position, and sets up a distance ring 12 different distance setting position in accordance with the 1st, 2nd and 3rd rotating positions. |
