The Cokin Black and White Kit is ideal for the enthusiast or professional black and white photographer. The kit contains: P001 Yellow Filter, P002 Orange Filter, P003 Red Filter, and P004 Green Filter. In landscape photography and B&W mode, the Yellow filter improves the contrasts between clouds and sky. For portrait, it lightens the faces and blonde hair at the same time as it softens freckles. The red filter is great for creating extreme contrasts, especially in the sky for landscapes. The green is often used in landscape photography and B&W mode because it lightens the nature and especially the greenery scenes (forests, fields etc). Cokin's orange filter increases the contrasts between reds and yellows. It darkens the skies, accentuates clouds and strongly subdues ambient light. For architecture photography, it helps to bring out the texture of the monuments' stones. Please note that the P-series adapter ring and adapter rings are not included and must be purchased separately.