Wratten color filters can make quite a dramatic difference when observing key features on the planets. For example the #80A Blue works well on the colour bands of both Saturn and jupiter. The #23A Light Red is excellent on the Maria & Surface, dust clouds and polar caps of Mars. #47 Violet for the upper clouds of Venus. The Neutral Density filter is probably the best and most pleasing on the eye for the moon. These are just some of the filters included in this comprehensive set.