The Urth 39 mm ND4 (2 Stops) Lens Filter Plus+ is a circular neutral density filter designed for professional photographers and videographers. It provides a fixed light reduction of 2 stops, allowing for improved control over exposure settings in various lighting conditions. This filter enables the use of wider apertures without overexposure, facilitating effects with shallow depth of field as well as long exposure techniques like motion blur. Made from German B270 SCHOTT optical glass, it ensures high durability and optical clarity. The filter features a 20-layer nano-coating that offers excellent protection against water, oil, and scratches while also making cleaning easier and promoting consistent light transmission. An ultra-thin magnalium frame minimizes the risk of vignetting, and the double-threaded design supports stacking filters and compatibility with screw-on lens caps. Ideal for low-light scenarios, this filter helps achieve cinematic effects while maintaining true color fidelity, making it a reliable accessory for creative photography and videography applications.