Feature: 1. [Premium Materials] This telescope filter is made of high quality optical glass and aluminum alloy, which is sturdy and durable. 2. [Easy to Install] After installation, it can be used normally, the picture is clear without distortion, and it does not affect the observation picture. 3. [Easy to Observe] Telescope moon filter can penetrate the vapor layer and ionosphere, and can observe deeper and farther in the polluted sky. 4. [Reduce Stray Light] The 12.5inch telescope filter can reduce the influence of stray light when observing star clusters and look for unfamiliar novae. 5. [Scope of Application] The telescope moon filter is mainly suitable for 1.25 inch telescope eyepieces, with strong practicability. Specification: Item Type: Telescope Filter Material: Optical Glass, Aluminum Alloy Applicable Aperture: 1.25 Inch Telescope Eyepiece. Package List: 1 x Telescope Filter1 x Storage Box