Double filter holder for Sinar Colour Control Filter system 125mm (5inch) Filter Holder 1 supports a single 125mm (5inch) filter. This filter Holder 2 holds 2 filters Several filter holders can be stacked and rotated in relation to each other. The back of the holder is designed as an attachment frame that will fit in every Sinar 4x5inch or 10x12.5 cm standard. Multipurpose Bellows 4x5inch-10x12.5cm 454.11 can be attached directly to Filter Holder 2-125 mm to serve as a lens hood. Adapter rings can also be attached to Filter Holder 2-125mm. This makes the Sinar 125 mm Filter System excellent for use on any view camera, regardless of brand