What is the SIRUI ND Grey filter?
Grey filters or neutral density (ND) filters, are uniformly darkened across the whole surface of the filter. Depending on the density, the filter can be lighter or darker. They reduce the amount of light that passes through the lens to the sensor without changing colours or contrast in the image.More Info
Why do you need a grey filter?
Filters are vital for long exposure shots in the daytime and lead to new creative possibilities. Without using a SIRUI grey filter, the image would be significantly over-exposed.
Soft wiping or flowing effects on moving water and passing clouds.
Busy locations and streets can be emptied of people using a long exposure and a grey filter.
Work with an open aperture to create a shallow depth of field. Excess light is compensated for by the filter.
It simply "swallows" a lot of the light, meaning that you do not need to compensate using the camera settings (such as aperture, exposure time or ISO).
Materials and Manufacture
The high quality of SIRUI filters begins with the material: they are manufactured from German Schott glass. The glass is fire-polished, ensuring a perfect optical surface. This process also makes the glass extremely robust and resilient. Rounded corners and polished edges make the glass shatter-proof. This also makes it easier to insert the filter into the holder. The precise manufacturing meets the highest standards. Accurate measurement procedures and strict quality control ensure consistent quality of the filters.