| 摘要 |
PURPOSE:To automatically change the magnification to a designated magnification by moving a second lens to a position where the correction after the movement of a first lens to a prescribed position is performed. CONSTITUTION:The magnification when a photographer determines the size of a subject by the operation of a button is a set magnification, which is stored in a CPU 154. The position information (a) of a variator lens group 2 is received from a zoom encoder 149, and the focus lens position information (b) is received from a step motor driver 162. From the position information (a), (b), the subject distance information C is approximately calculated and outputted. Then, the present photographing magnification (d) is calculated from the lens position information (a), (b). Each position a', b' of the variator lens group 2 and a focus lens group 4 is calculated from the present subject distance information C and the photographing magnification (d) to have a set magnification (e) preliminarily set by a setting means 8. Thus, both the lenses 2, 4 can be driven. |
