Bresser The Vixen ND4 Moon Filter for 31.7mm eyepieces reduces bright moonlight

The bright moon becomes even brighter when viewed through a telescope. With large telescopes, observing at full moon can cause significant eye strain and impair your night vision when you move your eye away from the eyepiece. This moon filter reduces the amount of light, allowing you to observe the moon in comfort. The moon filter features a screw thread for 31.7 mm eyepieces.   FEATURES Moon filter for 31.7 mm eyepieces Reduces the brightness of the moon Protects your eyes against bright moon light Weight: 10 g