功能

• Holders for securing square plates such as blackout plates (BBP), test targets, and square filters.
• The glass element is not damaged because it is sandwiched between a support plate with a cork attached to it and two screws with resin tips.
• A sliding cylindrical lens holder (CHA) is available to hold the square lens.
• * If the screw is tightly tightened to the glass element, the glass may break.