The Meade 07217 No.928 45-Degree Erecting Image Diagonal Prism Telescope Eyepiece is ideal for all Meade ETX models except ETX-60, 70 and 80AT. This prism creates images ideal for terrestrial observing that are upright and laterally correct and comes with a built-in magnification factor of 1.08-times. This erecting prism with a 45-degree observing angle attaches easily and provides images that are great for daytime work as well. This item weighs .20-pounds. The Meade 07217 No.928 45-Degree Erecting Image Diagonal Prism Telescope 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.