Hoya 0672 52mm HMC NDX400 Neutral Density Filter

The Hoya 52mm HMC NDX400 is a screw-in neutral density filter that blocks 9 stops of light from reaching your camera's sensor. This level of light reduction opens up creative possibilities that would otherwise be impossible in daylight — you can use multi-second shutter speeds to turn waterfalls and rivers into smooth, silky flows, blur moving crowds into ghostly streaks, or simply shoot wide open at f/1.4 or f/2 in bright sunshine without overexposing. The filter is designed to cut light evenly across the visible spectrum, so your images maintain their natural color balance without the heavy color casts seen in lesser ND filters.

Hoya's HMC (Hoya Multi-Coating) process is applied to the glass surfaces using a hard-coating technique that resists scratching while suppressing internal reflections, ghosting, and lens flare. This is particularly important on a high-density filter where any imperfections in the glass or coating can show up as artifacts in long exposures. The filter uses a standard 52mm screw-in mount, making it quick to attach and remove. Because the view through a 9-stop filter is extremely dark, photographers will typically want to compose and focus before attaching the filter, then switch to manual focus and use a tripod for the actual exposure.