Celestron 93436 Luminous 2-Inch 2.5x Barlow Lens (Silver)<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 Celestron 2.5x Luminos Barlow increases the magnification of any 2" or 1.25" eyepiece by two and a half times. </span></li><li><span class="a-list-item"> High-quality 4-element optics produce a flat field for sharp images that are free of extraneous color. </span></li><li><span class="a-list-item"> Hard-anodized aluminum barrel is threaded to accept 2" filters. </span></li><li><span class="a-list-item"> A brass compression ring holds eyepieces firmly in place， and large thumbscrews are easy to turn， even with gloves on. </span></li><li><span class="a-list-item"> A 2" to 1.25" adapter is included. Allows the use of both 2" and 1.25" eyepieces. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31gsS4F3AlL.jpg" noproxy>