1.25/2Inch Filter Variable Polarizing for Astronomy Monocular Telescope Eyepiece Star Filter Excellent Quality F9147 Features: 1.The 1.25/2-Inch variable Polarizing filter acts like a dimmer switch for your telescope. 2.Adjust the amount of light transmission from 1% to 40% by rotating the filter housing. 3.Reduces brightness of the Moon or planets for great clear viewing. 4.Finer control of the image brightness compared to a standard fixed-transmission telescope filter for optimal performance. 5.Fit standard sized 2 eyepieces and accessories. Notes: 1. Please allow 1-3cm measure error. 2. The color of the actual items may slightly vary from the above images due to different computer screen, thanks for your understanding. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store