The B and W 37mm XS-Pro 806 ND Filter can be used during image capture with a slow shutter speed and wide aperture. Its slim brass mount offers compatibility to mirrorless cameras and DSLRs. The filter factor of 1.8 reduces the exposure by 6 stops. This filter has a 3-layer MRC-nano multi-coating given by employing a thin-film technology. The inner coating layer eliminates reflections while the outer layer resists dust and moisture to facilitate maintenance. A lens cover or hood can be fitted to the front 37mm accessory thread.