Featuring a new quick-release design, the new Haida Filters M10 filter holder allows for quick filter installation and ease of operation. Install the adapter ring first, then the holder, then it's just an easy process to insert the filters. The new design allows the drop-in circular polarizer filter (not included) to be inserted into the bracket, eliminating annoying screws in the nets, allowing for faster installation. With less time spent on assembly, you'll have more time to dedicate to the creative process. The 100mm M10 filter holder is made of aerospace aluminum and PC material, resulting in a sturdy yet lightweight filter holder. The M10 holder is designed to allow the use of up to 2 filters (100 x 100mm or 100 x 150mm) and the round CPL on a full camera with a focal length of 16mm without vignetting. A 360-degree light seal is mounted to prevent light leakage on long exposures and an 8cm non-slip rough cotton strip on the base of the holder frame provides a better grip, reducing the risk of filter breakage. Designed to withstand the rigors of outdoor photography, the new Haida M10 filter holder is an absolute joy to use. This is just the filter holder, it does not include an adapter or CPL.