Gobe NDX 52mm Variable Neutral Density Lens Filter Rotating ring between ND2-400 giving great versatility in changing light. Reduces the amount of light without effecting colour balance Ultra slim rim profile to avoid vignetting on wide angle lenses. Extra tough Magnalium frame ensuring durability and jamming prevention Eliminates overly bright & washed-out images. Enables slow shutter speeds to record movement in subjects such as waterfalls providing a silky smooth effect to flowing water Decreases depth of field by allowing a wider aperture, helping to separate subjects from their background. The variable ND filter is not recommended for use with a wide-angle lens. Lens caps and hoods are also not compatible. 5 trees planted for every Gobe product purchased. Join the revolution! Designed in Australia, Assembled in China