The M10-II Drop-In ND4.5 (32,000X) Nano-Coated ND Filter from Haida creates a darkening of the entire image, allowing you to photograph with a wider aperture or longer shutter speed than normally required. By slowing your exposure time or increasing your aperture, you are able to control depth of field and convey movement more easily. This ultra filter receives an additional lapping and polishing process during production to ensure lower reflectivity and improved clarity and sharpness. Neutral density filters are intended to not affect the coloration of the image and are ideal for pairing with other filters. Nano coating provides an improved beading effect with water or oil for more efficient cleaning. It is upgraded with an aluminum alloy frame to be closer to the holder and better protected.