The Meade 07730 Series 5000 HD-60 4.5-Millimeter Eyepiece has a large 60-degree apparent field of view and a tack sharp, flat field of view. With a 1.25-inch barrel and adjustable twist-up rubber eye guards for maximum comfort. This item includes a 6-element, multi-coated optical design with premium-grade optical glass and blackened lens edges for greater contrast that removes stray light. The Meade 07730 Series 5000 HD-60 4.5-Millimeter Eyepiece 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.