ND adjustable variable diameter mirror adopts high-quality optical glass with ultra-high finish, which is perfectly combined with imported optical Sun Dong polarizing film. The materials used are ultra-high polarization and high pass rate polarizing film, ultra-hard aviation aluminum, seamless back pressure precession structure, and perfect surface treatment collar to eliminate harmful reflection in shooting.
Double-sided super multi-layer coating makes this ND adjustable reducer look more upscale. The design of super-long external thread teeth makes it more firm and reliable when applied to lenses.