The Urth 40.5mm ND4 (2 Stops) Lens Filter Plus+ is a professional circular neutral density filter for photographers and videographers. This filter provides a fixed light reduction of 2 stops, allowing for precise control over exposure settings in various lighting conditions. Made from high-quality German B270 SCHOTT optical glass, the filter features 20 layers of nano-coating that enhance protection against water, oil, and scratches while ensuring uniform light transmission. The ultra-slim Magnalium frame design prevents vignetting and makes it compatible with wide-angle lenses. Its double-threaded construction supports stacking with other filters and accommodates standard screw mounts for lenses. The ND4 filter preserves the original color rendition without color distortion and enables photographers to achieve creative effects such as motion blur and shallow depth of field in bright conditions. The multi-coating also makes cleaning easier and maintains optical clarity over long-term use. With a diameter of 40.5 mm and a standard filter thread, this neutral density filter is designed for durability and reliable performance in professional photography applications. Its precise light reduction capability makes it suitable for long exposure photography, landscape shots, and video recordings where controlled light exposure is crucial. The robust construction and advanced optical coating ensure consistent performance under various environmental conditions while maintaining the image quality integrity of your camera.