The Cokin Orange filter splits the difference between Red and Yellow making it one of the most versatile and popular of the B&W filters. Portrait photographers use it often because it reduces the appearance of freckles and blemishes. It gives the skin a smooth and healthy look. Architectural and cityscape photographers love how it enhances bricks and other building materials. It increases contrast and adds more texture and depth. Buildings just pop a lot more when you use it. Similar to red filters, they can be used to reduce the appearance of fog and haze, and darken skies and emphasize clouds. It strikes a nice balance between the red and yellow filters and can be left on all the time while photographing outdoors. Filter Dimensions 100mm x 100mm Filter Factor 4x (2-stop) Filter Construction C39 Optical Resin