With a cokin z pro 197 sunset 1 resin filter you dont have to wait until evening you can simulate the colors of the setting sun at any time of day cokin sunset filters come in two grades s 197 and 198 with 198 having a greater effect the z pro series is recommended for focal lengths of 20mm onwards in the 35mm format this filter is made of cr39 resin which is a reputable lightweight and unbreakable optical material also used for ophthalmic glasses note most cokin color filters ar