| 摘要 |
PURPOSE:To easily form the internal structure of the lens barrel through simple operation by performing focus locking operation and go-home operation with the same switch. CONSTITUTION:An automatic focus adjusting means 112 drives a focusing optical system L3 with the driving force from a power source 25 to perform automatic focus adjustment and the focus is locked by manual operation to monitor the position of a focusing optical system L3 by a detecting means 36. Then a storage means 101 stores the output value of the detecting means 36 corresponding to an optional photography position in the photographable range of the focusing optical system L3 and a go-home driving means 104 returns the focusing optical system L3 to the optional photography position according to the storage contents of the storage means 101; and the focus-locking operation is started by pressing a two-stage type push-button switch 14 by one stage and the go-home driving means 104 is actuated by pressing the switch to the 2nd stage. Consequently, the internal structure of the lens barrel is easily constituted through the simple operation. |
