Telescope Filter, Moon Surfaces Overall Brightness, inch Moon Filter, Transmission for Telescope Eyepiece Parts. ,

Interface Specification: .5 x 0.6mm thread size, suitable for 1.25 inch barrel of the telescope eyepiece. Neutral Density Filter: Reduce the amount of light without affecting color balance, neutral color will not alter the natural color of the Moon. Moon Filter: The moon filter can reduce the glares and reduce transmitted reflected light, allowing you can see the surface more clearly and study the greater comfort. Material: High quality acrylic lens and aluminum frames, increase surface durability, easy to install. Feature: Finer control of the image brightness for optimal performance.