This 37mm #630/091 Dark Red MRC Basic Filter from B+W can be used to increase image contrast using black-and-white film. When using this filter, blue skies are reproduced in dramatically darker shades of gray than if a filter was not used. Simultaneously, red to light yellow subjects are rendered in lighter shades of gray. Landscape and architectural photos show an increased, almost graphic contrast, while a cloudy sky may already appear dramatic.

B+W MRC Basic filters are made with the exclusive Multi-Resistant Coating (MRC) nano premium coating technology. This high-quality broadband coating is applied on both sides and enhances the optical imaging properties, allowing uniform and increased transmittance across the entire light spectrum to be achieved, with minimal physically induced remaining reflection. The nano all-around protection on the filter glass also ensures increased scratch resistance and extremely fast, easy cleaning, providing a long filter life. The slim filter ring design is compatible with wide-angle lenses with an equivalent width of a 17mm full-frame lens. The top knurling is redesigned for enhanced gripping.