The Cokin Black & White Kit is ideal for the enthusiast or professional black & white photographer. The kit contains: P001 Yellow Filter, P002 Orange Filter, P003 Red Filter, & P004 Green Filter. In landscape photography & B&W mode, the Yellow filter improves the contrasts between clouds & sky. For portrait, it lightens the faces & 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 & B&W mode because it lightens the nature & especially the greenery scenes (forests, fields etc). Cokin's orange filter increases the contrasts between reds & yellows. It darkens the skies, accentuates clouds & 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 & adapter rings are not included & must be purchased separately.