The Hitech 85mm Yellow Green No. 11 Resin Filter is ideal for scenes where it is important to differentiate the green tonal values in black and white photography. The application is especially suited to landscape photography because it enhances the light green color of the leaves. Due to its favorable effect on red tones, it is also suitable for portraits. This filter measures 85 x 85mm and fits the Cokin P series holder and the Hitech "P" series holder. The Filter factor is 2 (+1 stop).