The LX90-ACF comes in a complete line of OTA apertures, from 8-inch to 12-inch. All sizes come with the Advanced Coma-Free (ACF) optical systems. Meade’s AudioStar® controls the telescope to find and track any of over 30,000 celestial objects automatically. Share the wonders of the universe with friends and family as they listen to audio content through its built-in speaker. The LX90-ACF's built in GPS sensor precisely provides the time, date and location, allowing for a quick assisted alignment.