The Urth 39mm Variable ND2 400 + 1/4 Black Mist Filter Plus+ is an optical filter with dual functionality for photographers and videographers who require precise exposure control and creative diffusion effects. This 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), allowing for flexible shutter speed and aperture adjustments in bright lighting conditions without compromising image quality. The integrated 1/4 black mist diffusion creates a gentle softening effect that reduces harsh contrasts and minimizes digital sharpness while maintaining overall image clarity—ideal for cinematic looks, portrait enhancement, and reducing skin imperfections. Made from multi-coated optical glass, this filter preserves color accuracy and minimizes reflections, lens flares, and ghosting. The slim brass frame features front threads for stacking additional filters and is precision-engineered for a secure fit without vignetting on wide-angle lenses. With a diameter of 39mm, it is compatible with lenses and adapters of this standard thread size. The Urth Variable ND2 400 + 1/4 Black Mist Filter Plus+ provides a practical solution for creative professionals who need both exposure control and atmospheric management in various shooting situations.