ND Filter (neutral-density filter)
The Rollei Profi ND Filter is a rectangular-shaped, professional, neutral-density filter, suitable for the Pro Filter holder sets from Lee, Nisi, Cokin, Haida and Rollei, of course. The abbreviation ND stands for Neutral Density, which refers to light density. In colloquial speech, we also talk about “swallowing light”, since the ND filter also reduces the amount of incoming light. This produces a uniform darkening, which also explains the alternative name, “grey filter”.
High-quality glass processing
To obtain excellent photo quality, your photo equipment must, of course, be of high quality. This is why our Rollei Profi Rectangular Filters are made of real glass and processed to a high standard. The filters are made of fine, annealed H-K9L optical glass and are multiple-coated on both sides.