Filter #1: Variable Polarizer. Reduces brightness of the Moon or planets. Reduces brightness, glare & reflections and improves contrast. The filter consists of two high-grade glass polarizing filters in a rotating cell that allows you to adjust the amount of light transmission from 1% to 40%. Great for daylight, especially on sunny days. Rotates to give a variable light reduction rate from 1% to 40% Filter #2: LiPo Broadband light pollution reduction. Reduces Light Pollution for Crystal Clear Night Skies Blocks out skyglow without changing the entire color spectrum. Fits any telescope with a 1.25" eyepiece, including Celestron, Orion, Meade etc.