1、This set contains 6 different color filters, each with its own function, can meet your different needs. 2、Light Purple: Reduces dazzling when viewing the moon. Yellow: Contrasts strongly with the blue features of Jupiter and Saturn, while accentuating the red and orange features. Can be used to increase the contrast of lunar characteristics. 3、Orange: Used to improve the contrast of light and dark when observing space, can penetrate clouds, can observe dust storms on spark, can be used to observe the great red spot of Jupiter works well. Red: Strong contrast and enhanced blue-green surface detail. Useful for Jupiter, Saturn and spark. Increase the contrast between bright blue-sky during daytime or dusk observations. 4、Light green: Spark, ice cover and yellow dust storms also contrast with an increase in red and blue features on Jupiter and the moon. Blue: Useful on the moon, Spark, Jupiter and Saturn to increase contrast without significantly reducing the brightness of the image. 5、The filter is threaded and compatible with any 25 inch telescope and can be used individually or in stacks. 6、Easy to install and use, they help filter out unnecessary light and make you look clearer. 7、Made of high quality material, portable and durable.