Orion 10067 StarSeeker III 102mm GoTo Mak-Cass Telescope (Metallic Burgandy) With a long 1300mm focal length and substantial f/12.7 focal ratio, this 102mm (4 inch) aperture Star Seeker III GoTo Make-Cass excels at high-power views of the Moon and planets Huge GoTo database of over 42,000 objects for a great view on any clear night 102mm (4.0 inch) Maksutov-Cassegrain design packs a lot of magnifying power into a small, portable telescope Once an object is located, the Star Seeker III 102mm will automatically track it so you can relax and enjoy the view Includes 25mm and 10mm 1.25 inch eyepieces, 90-degree diagonal, EZ Finder II reflex sight, and more