ND1000 Neutral Density filter that reduces the light passing through the lens by 10 stops. Filter thread: 82mm

A neutral density (ND) filter reduces the amount of light that reaches the lens. An ND1000 darkens the image by about 10 stops, or about 0.002% of the light. The equivalent darkness would be achieved with, for example, two ND64 filters.
Usually, there is a shortage of light in photography, but sometimes there can be too much. In bright sunlight, using a large aperture can be impossible without an ND filter. A neutral density filter is also needed when you want to photograph, for example, flowing water in bright weather and with a really long exposure time.
The filter end has a female thread that matches the mounting thread.