The Meade 3514-04-15 ETX 90-Millimeter Telescope is designed to be the ideal, ultra-portable telescope. The ETX marries Meade’s unsurpassed optics with industry-leading electronics to deliver an exceptional viewing experience. Meade’s unmatched Maksutov-Cassegrain optics provide high resolution and contrast for more detail and the ability to see fainter objects. Combine that with the easiest alignment system available and the Autostar controller and you have simple, immediate access to over 30,000 celestial objects- all at the push of a button. With the ETX’s classic styling and advanced engineering, your telescope is ready for a lifetime of use. This telescope has a 90-millimeter aperture, a focal length of 1250-millimeters with a focal ratio of f - 13.8. All ETX Telescopes come with razor sharp optical systems, computerized GOTO mounts, adjustable tripods, AutoStar Suite Software and a 26-Millimeter (Series 4000 Super Plossl) eyepiece. Suggested Accessories: Series 4000 Eyepieces and no.546 AC power adapter. The Meade 3514-04-15 ETX 90-Millimeter Telescope comes with a 1-year warranty. 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.