Celestron Variable Polarizer 1.25 In Black

Celestron Variable Polarizer 1.25 In Black. Unlike regular Moon Filters and Neutral Density Filters the level of brightness can be reduced to just 1percent or as much as 40percent. To make the adjustment simply rotate the filters lower ring and the image gets brighter or dimmer. This filter does not alter the color of the object youre observing making it a great choice for astroimaging especially when imaging the surface of the Moon. By reducing the brightness lunar details become more pronounce