The Meade 07221 No.937 90-Degree 2-Inch Diagonal Mirror for DS-2080AT Telescopes accepts eyepiece with 2-inch barrel diameters. An adapter is included in order to attach eyepieces to the diagonal mirror. This model is only needed for DS Series refractor telescopes and not for reflecting DS Series models. The Meade 07221 No.937 90-Degree 2-Inch Diagonal Mirror for DS Series Telescopes comes with a 1-year limited warranty. Meade has everything you need to capture the night sky for experienced star-shooters, serious researchers and beginners alike. Serious astronomers for years have flocked to Meade telescopes for their quality optical systems and patented technology. Consumers know that "Meade Optics Inside" means that what they see through our telescopes will be views that are detailed, crisp and full of contrast. Look through a Meade this evening and see what you"ve been missing.