| 摘要 |
PURPOSE:To increase mounting strength and to enable easy and accurate fixing of a mount by disposing >=2 pieces each of screws which are engaged with the V-groove provided to a lens barrel and attract the mount to the lens barrel side and set screws with good balance. CONSTITUTION:The V-groove 7 is provided to a master barrel 3 and slotted screws 3 are engageably attached thereto. The slotted screws 5 and pan-head screws 6 for setting are disposed in >=2 pieces each to the barrel 3 with good balance. A spacer 8 is inserted between the barrel 3 and a C mount 4 and the screws 5 are tightened up in the case of adjusting the focal length of a flange to a permissible value. The mount 4 is thereby attracted toward the lens barrel side and is fixed by the screws 6. The mounting strength is thus increased and the easy and accurate fixing of the mount 4 to the lens barrel is made possible with the simple operation. |
