The Celestron StarSense Autoguider is an all-in-one accessory that makes using your telescope easier and more rewarding than ever. This powerful, compact device connects to your Celestron mount to enhance its pointing accuracy. It makes tiny adjustments to the mount’s tracking to keep your target locked in for sharp, detailed images over long exposure times. Whether you’re an experienced astroimager or just starting, you’ll have more quality time under the stars. The StarSense Autoguider features a high-quality 4-element optical design devised by the famed optical designer Mark Ackermann, a highly sensitive Sony IMX462LLR-C, monochrome, back-illuminated CMOS image sensor, and an onboard computer working together to provide exceptional guiding accuracy and deliver sharper images. With no user input needed, StarSense Autoguider can independently align your telescope to the night sky in about three minutes. Celestron’s patented technology “sees” star patterns overhead and matches them to its internal database to align the telescope to the night sky. StarSense Autoguider also dramatically simplifies the polar alignment process when used with a German equatorial mount. What’s more, precise GoTo functionality places your celestial objects in the center of the field—even if you’re using a high-powered eyepiece or today’s smallest astroimaging camera sensors. This one simple tool eliminates the need for additional accessories when autoguiding. StarSense Autoguider works with CGX-L, CGX, CGEM II, Advanced VX, CPC GPS XLT, CPC Deluxe HD, NexStar Evolution, and NexStar SE computerized mounts. You can control the autoguider via your NexStar hand control, CPWI telescope control software via PC or WiFi with the addition of the SkyPortal WiFi Module. In heavy dew conditions, an included dew shield helps prevent dew from forming on the exterior of the objective lens. It also acts as a lens shade to block stray light. Simply thread it onto the front of the autoguider before use.