Orion 5657 2-Inch UltraBlock Narrowband Eyepiece Filter<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> The Orion UltraBlock is the ideal eyepiece filter for deep-sky observers located at highly light-polluted sites </span></li><li><span class="a-list-item"> Narrowband filter blocks all forms of light pollution </span></li><li><span class="a-list-item"> Enhances the presence of a significant number of fainter deep-sky objects </span></li><li><span class="a-list-item"> Compatible with threaded Orion 2" eyepieces. Metal filter cell construction. </span></li><li><span class="a-list-item"> Save yourself a trip to dark skies - with the UltraBlock filter you can enjoy the stars from the suburbs! </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/512fBcmTasL.jpg" noproxy>