Use this stackable SmallRig 3649 Filter Frame Kit (4 x 5.65"") in combination with your Star-Trail or Revo-Arcane matte box to balance your exposure with retractable filters in challenging lighting conditions. The set includes two holders that can accommodate 4 x 5.65"" filters of 4mm thick.A stackable clamp-on back makes it possible to layer the filter holders on top of each other and increase your filtering options. The holders have a quick-release design for easy installation. The aluminium alloy construction makes them lightweight and durable.
