The Moon is the most often viewed celestial object that connects us to every other being on our planet. However, it is difficult to look at the Moon through a telescope due to its brightness.
So when astronomers observe the Moon, we normally use a moon filter, which provides similar effect like sunglasses, helps to protect our eye from glare and observe the moon with more details.
Simply screw this Moon Filter onto the insert barrel of most 1.25” eyepieces and its only takes few seconds to transform your regular eyepiece into one suitable for lunar observations.
This filter is not suitable for viewing the Sun.