Celestron - SkySync Telescope GPS Accessory – Automatically Updates your Telescope with 16-channel GPS Data, Time, and Date - Save Time & Improve the Accuracy of your Telescope Alignment, Black (93969)Computerized telescopes rely on time, date, and location information to create an internal model of the night sky. Your telescope’s pointing and tracking ability is only as good as the information the telescope receives. For the best alignment possible, we created the SkySync GPS Accessory, which provides real-time 16-channel GPS data from orbiting satellites to your hand control.Using this handy device couldn’t be simpler. Just plug it into the hand control itself or any available AUX port on your mount. Instead of going through the time-consuming process of manually entering time, date, and location information, SkySync supplies it automatically. In addition to the improved accuracy, you’ll appreciate the time savings each and every time you align your telescope.SkySync blends in seamlessly with your existing telescope setup. A Velcro strap secures it to the tripod leg, where it is safely out of the way. The device is powered by the mount itself, so there’s no need for an extra battery. And since it relies on Global Positioning System (GPS) satellites, you can count on it to work in even the most remote dark sky observing sites.Every serious visual observer or astroimager looking to upgrade his or her telescope setup will enjoy the convenience and user-friendly design of SkySync.Compatibility InformationSkySync GPS Accessory is compatible with all non-GS Celestron computerized mounts.Celestron - Zoom Eyepiece for Telescope - Versatile 8mm-24mm Zoom for Low Power and High Power Viewing - Works with Any Telescope that Accepts 1.25" EyepiecesThe Celestron 93230 is a super-premium fully multi-coated 1.25-inch zoom eyepiece with a focal length of 8 to 24 millimeters. It allows for expanded magnification options, and also features a 40 to 60 degree field of view and 15 to 18 millimeter eye relief. Celestron offers a 1-year warranty.The amazingly versatile Celestron 8 mm - 24 mm zoom eyepiece allows you to choose from a variety of magnifications in a flash! Simply grip the rubberized barrel and turn it slowly while looking through the eyepiece, and then pick the best power for the object you are observing. Alternatively, you can use the lowest magnification (24 mm) to find an object and center It in your field of view, and then increase the power until the desired view is achieved. It is fast and easy, and lets you examine any object at various magnifications without requiring you to physically change eyepieces.