The Xume 49mm Lens Adapter and Filter Holder Starter Kit from B&H includes one lens adapter and two filter holders to provide quick and easy attachment and removal of two different filters on one lens.
The Xume Lens Adapter and Filter Holder system revolves around both filters and lens' filter rings receiving precision-machined metal rings and then utilizing NdFeB rare Earth magnets to facilitate a secure, but easy to remove, connection between the filter and lens. By using a magnetized, non-threaded connection, the chance of cross-threading or jamming filters onto the lens is eliminated and time is saved when swapping filters.