walimex ND Filter ND4 72 mm Product features: * ideal for landscape photography * ensures even dim-out of the picture * reduces the amount of light and makes slower shutter speeds possible * extends expose time by 2 f-stops * creates wiping or flowing effect in long exposure shots * excellent optical characteristics * precisely manufactured metal frame * top quality Ideal for landscape photography The ND filter by walimex ensures an even dim-out of the picture. It reduces the amount of light and by doing that also extends the shutter speed by 2 f-stops. The filter makes longer exposure times possible giving you a wiping or flowing effect in long exposure shots. With it e.g. flowing water looks very soft or like flowing fog. Excellent workmanship The ND filter has great optical characteristics. The high-quality lens is inserted in a precisely manufactured metal frame. The filter comes with an additional inside thread which allows you to use additional filters. It is transported in a protective case. Technical specifications: * Diameter: 72mm * Height: approx. 7mm * Weight: approx. 15g