The Urth 67mm Solar ND100000 (16.6 stops) Filter Plus+ is a high-density neutral density filter designed for extreme light reduction in photography and videography applications. This filter offers 16.6 stops of light reduction and is ideal for solar photography, long exposures in bright conditions, and creative motion blur effects. With a 67mm thread, it is compatible with lenses of this filter diameter. The ND100000 designation indicates extremely dense filtration, allowing for significantly longer exposure times even in daylight. Made from optical glass with a multi-layer nano-coating, this filter preserves color accuracy, minimizes color casts, and provides consistent neutral density across the entire image field. The slim aluminum frame reduces vignetting when used with wide-angle lenses and features a front thread for stacking additional filters. The anti-reflective coating on both sides prevents lens flares and ghosting for high contrast and sharp images. This filter is particularly useful for photographers capturing solar eclipses, sunspots, or other solar phenomena when used with appropriate solar filter equipment. In landscape photography, it enables soft water effects, cloud movement, and motion blur in bright light. The robust construction resists scratches and environmental influences for outdoor use. For maintenance, clean microfiber cloths are recommended. When calculating exposures with this filter, it is important to note that 16.6 stops of reduction requires significant exposure compensation, typically necessitating manual exposure settings and possibly a tripod for stable long exposures.