B+W's Series 8 Light Red 022 Glass Filter is a filter for black and white film.
This is the classic filter for architectural photography. White facades glow brightly, the blue sky is darkened dramatically and clouds become more impressive. It is also excellent for spectacular landscape photographs with greatly improved distant views. Its filter factor is approximately 5.
Each glass surface is vacuum coated with one layer of Anti-Reflection coating. This single layer helps to prevent internal ghosting and reflections. It also improves light transmission from approximately 92% (uncoated glass) to over 98%.
This filter uses B+W's Series mount made of brass. Filter glass, in mounts without threads, are placed into special holders and are held in place with a retaining ring or lens hood.