Orion Variable Polarizing Filter 2"

SKU: 05562

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  • Regular price $59.99

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The Moon is one of the most enticing targets to view in the night sky. Thanks to its big, bright appearance and intriguing landscape features, the Moon is a favored sight by amateur astronomers all over the world. The Moon is in fact so bright with reflected sunlight, especially during a Full Moon, that it can overwhelm astronomers with distracting and view-degrading glare. The specialized 2" Orion Variable Polarizing Filter for 2" telescope eyepieces provides an elegant solution by toning down the brightness of the lunar surface so you can enjoy optimized contrast in each and every view of our nearest neighbor in the solar system.   

This versatile 2" Orion Variable Polarizing Filter acts like a dimmer switch for your 2" telescope eyepiece, toning down the brightness of the Moon and even planets to a comfortable level. Not only does this dimming provide a more comfortable view, it also helps to enhance contrast of interesting lunar features such as mare (or "seas"), mountains, valleys, and of course all those stunning craters. Reducing the overall brightness of the Moon helps reveal more surface details so you get the most out of each view. 

Variable Polarizing Filter

The 2" Orion Variable Polarizing filter consists of two high-grade glass polarizing filters securely held in a rotating telescope eyepiece filter cell that allows you to vary the amount of light transmission over a wide range from 1% to 40%. Such control is highly desirable for lunar observing because the Moon's brightness varies with its phase and with the aperture and magnification of the telescope you are using. For example, to view the Full Moon with any degree of clarity would require a significant amount of dimming, closer to the 1% transmission limit. On the other hand, when the Moon is a thin, waning crescent in the night sky, you'll get the best results with minimal darkening, closer to 40% transmission. The Variable Polarizing Filter won't change the Moon's natural color, so your views will simply be optimized, not altogether altered.

The anodized aluminum eyepiece filter cell threads into the barrel of any Orion 2" telescope eyepiece, and fits most other brands of telescope eyepieces too. Includes a durable plastic storage case.

Get the 2" Orion Variable Polarizing Filter today and see fine surface details of any phase of the Moon like never before!


  • The Orion Variable Polarizing eyepiece filter acts like a dimmer switch for your telescope, to tone down brightness and accentuate contrast of bright celestial objects
  • Gives you much finer control of the image brightness compared to a standard fixed-transmission telescope eyepiece filter for optimal performance
  • Adjust the amount of light transmission from 1% to 40% by rotating the eyepiece filter housing
  • Consists of two high-grade glass polarizing filters in an 2" rotating anodized aluminum cell
  • Threaded for use with any Orion 2" telescope eyepiece equipped with filter threads

    For telescopes that use a diagonal (refractors, SCTs, and Maks), separate the variable polarizing filter into its two halves.  Screw one half (it doesn't matter which half) onto the part of the diagonal that inserts into the telescope.  Put the diagonal back into the telescope, using the thumbscrews to make sure that it is tightly in place. 

    Screw the other half of the filter onto the bottom of the eyepiece that you're using to observe.  Put the eyepiece into the diagonal; however, don't use the thumbscrews to tighten the eyepiece in place.  Instead, while you're observing, twist the eyepiece slowly to adjust the level of brightness to your liking, anywhere between 1% and 40% transmission.  

    For telescopes that don't use a diagonal (dobsonians/newtonians), keep the two halves of the filter together.  Screw the filter as one piece onto the bottom of the eyepiece that you're using to observe.  Put the eyepiece into the focuser.  When you want to adjust the level of brightness, pull the eyepiece out of the focuser and give the bottom part of the filter a small twist, and then replace the eyepiece into the focuser.