You're a particularly fortunate person. That is because you have found Advanced GT equipment. These items tie together as a specific subsection of Celestron, and they have comparable features and a reliable performance level. Consider the Celestron Advanced GT items we have below, and if you have any questions tell us. Our industry experts will help you figure out if Advanced GT gear is perfect for you, or if another Celestron series could be a better fit. If you're concerned with quality, check out our Celestron Reviews. They were written by customers like you and give useful insights. And remember that a majority of orders over $49 receive free shipping!