Orion Moon Filter - 2" Round Mounted

  • Helps reduce the bright glare of the Moon so you can see more lunar detail and surface features with your telescope
  • 2-inch Moon filter threads directly into the barrel of a 2-inch telescope eyepiece
  • Especially useful for large aperture telescopes through which the bright Moon surface can be overwhelming
  • Transmits just 13-percent of the incoming light to your eye, enhancing your view
  • Neutral filter will not alter the natural color of the Moon in your views


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  • Regular price $24.99

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Orion Moon Filter - 2" Round Mounted

This Orion 13-Percent Moon Filter reduces the Moon's glare, allowing transmission of only 13-percent of the reflected light. The Moon's disk, even at partial phases, is intensely bright with reflected sunlight. The glare washes out most of the craters, rilles, and other surface details from view.  Not only will you see more surface features, but you can study them in greater comfort. The filter reduces irradiation, which is the distortion at the boundary between light and dark areas, such as along the lunar terminator.

The Orion Moon Filter is especially useful to owners of large-aperture scopes, in which the Moon's brightness can be overwhelming. It uniformly reduces light over the entire visible spectrum. Screws into threaded eyepiece barrel.



Filter Side Adapter SizeRound
Integral Transmission0.13
WarrantyOrion Limited Warranty
Customer Reviews
4.2 Based on 5 Reviews
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Filter Reviews:
David E.
United States
Did the job

This moon filter reduced the brightness of the moon so that it was comfortable viewing a half illuminated moon.

Fakhri A.
A dimmer view

Good product. Does what it is supposed to and does it well. Super fast shipping by OPT!!

Glen F.
United States

Just what I needed.

Harley D.
United States
Fast and easy.

Good product, well priced and super easy to use. One of those products you wonder how you did without.

christian M.
No ha llegado!

Siempre tengo problemas con las.compras con optcorp, quizá porque soy de México existe discriminación o no sé por qué razon, siempre o casi siempre hay algún inconveniente o algún problema, es muy molesto...