Half-fixed holder

[Features]
· The mounting position of various types of adapter plate can by adjusted in the YZ axes.
· Since the mounting position is fixed with screws, it will not move after being fixed.
· Since the adapter plate is mounted using screws in two locations on the bottom side and there is no obstruction on the upper side, it is easy to handle from the top.
· Use where no changes will be made once adjusted, such as adjusting the optical axis of lenses.