The Urth 58mm Variable ND2 400 + ¼ Black Mist Filter Plus+ is an optical double filter for photographers and videographers, allowing for precise exposure control and creative diffusion effects. This professional filter combines a variable neutral density function with a subtle black mist diffusion layer in a single high-quality glass element. The variable ND component offers adjustable light reduction from ND2 (1 stop) to ND400 (approximately 8.6 stops), enabling correct exposure in bright light while maintaining the desired shutter speed and aperture for motion blur or shallow depth of field. The integrated ¼ black mist diffusion creates a gentle softening effect that reduces harsh contrasts and softens digital sharpness without compromising overall image clarity—ideal for portraits and cinematic video applications. Made from high-quality optical glass with a multi-layer nano-coating, the filter provides exceptional light transmission, color fidelity, and resistance to reflections, water, and oil. The slim aluminum frame ensures compatibility with most lens hoods and minimizes vignetting on wide-angle lenses. With a standardized 58mm front thread, the filter fits various camera lenses of this diameter. The Urth filter represents a practical solution for creative professionals who need both exposure control and atmospheric diffusion in a single durable optical accessory.