- 1.25″ Moon filter
- Fits most eyepieces having standard 1.25″ threading
- Cuts down glare of the moon and allows us to see remarkable details on lunar surface
- Allows only 25% of light transmission
The Moon has the distinction of being the most often viewed celestial object through backyard telescopes. It is undoubtedly beautiful and mysterious, and is one of those constants in our lives that connects us to every other being on our planet. Regardless of who we are or where we live or travel, we all look at the same moon.
It is difficult to look at the Moon through a telescope and see all of the details due to its brightness. Our eyes are not ready for the bright beam of light that emits from the eyepiece, and they “stop down”, just as they would when you step out into the sunlight on a bright summer’s day. When we’re in the sunlight, we often wear sunglasses. They help us relax our eyes, protect us from glare, and help us see things more clearly. When amateur astronomers observe the Moon, we use a moon filter. This Moon Filter provides similar benefits to those of sunglasses…our eye relaxes and opens up to let us see more detail. This is especially important when observing the Moon when it is near full.
This Moon Filter simply screws onto the insert barrel of most 1.25” eyepieces. It only takes a second or two to transform your regular eyepiece into one suited for lunar observations. A Moon Filter is also helpful when observing Venus or bright terrestrial scenes.
Note: this filter is only to observe moon, bright planets and some twin stars. Please do not observe the Sun through this filter or through any binocular or telescope unless you specifically have a correct solar filter covering the objective.