The Urth 37 mm ND4 (2 stops) Lens Filter Plus+ is a circular neutral density filter designed to reduce the light entering the camera by 2 stops, allowing for precise control over exposure settings. This filter enables photographers and filmmakers to use wider apertures for shallow depth-of-field effects in bright lighting conditions and supports long exposure techniques without overexposure. Made from German B270 SCHOTT optical glass, it ensures high light transmission and minimal color cast. The filter features an ultra-thin magnalium rim to prevent vignetting and is double-threaded for stacking with other filters or attaching lens caps. It includes 20 layers of nanocoating for enhanced durability, offers resistance to water, oil, and scratches, and facilitates easy cleaning. Ideal for achieving motion blur and cinematic images, this filter maintains image quality and reliability in various lighting situations. With a diameter of 37 mm, it is compatible with lenses of the same thread size and provides a robust solution for creative photography and videography applications.