Extends the exposure time by a factor of 1000. Makes unwanted people in the image invisible. Precisely crafted metal frame. Makes people disappear. The gray filter from walimex pro enables extreme long exposures. It extends the exposure by a factor of 1000, allowing even people who inadvertently walk through the frame to "disappear." This makes the ND1000 gray filter excellent for architectural photography. Outstanding craftsmanship. The gray filter features excellent optical properties. The high-quality filter made of multi-coated glass is embedded in a metal frame and can be adjusted precisely. It is transported in a protective case that shields the filter from harmful UV radiation, significantly increasing its lifespan.