For 75 years, B+W Filter stands for top quality "Made in Germany".
B+W 86mm UV Haze SC 010 Lens Filter by Schneider Optics at B&C Camera
A Guide to color filter used with B&W Film - The Darkroom Photo Lab
How Black & White Filters Work – Hoya Filters
Colour Filters Basic Use for Black and White Film Photography - Tahusa
B+W Filter UV-Haze 1x 010 MRC Filter for 77mm Lens
20D B&W filters (Yellow, Orange & Red) - Canon EOS Mount - Photo.net
Amazon.com : B + W UV-Haze Protection Filter for Camera Lens – Ultra Slim Titan Mount (T-PRO), 010, HTC, 16 Layers Multi-Resistant and Nano Coating, Photography Filter, 82 mm : Electronics