Celestron NexStar 90SLT

Celestron's innovative NexStar Star Location Telescope (SLT) has been a customer favorite for years thanks to its unique combination of high-quality optics, a user-friendly computerized interface, and a sturdy single fork arm mount.This telescope comes with a pre-assembled, adjustable stainless-steel tripod, quick release fork arm, NexStar+ compute... morerized hand control, 90mm Maksutov-Cassegrain optical tube, and lots of bonus accessories.The entire telescope kit is a simple, no-tool assembly and fast SkyAlign alignment procedure will have you ready to observe in minutes. This makes NexStar 90SLT your perfect companion for impromptu observing sessions and all-night stargazing marathons alike.Your NexStar 90SLT will reveal details of the lunar surface, Venus and its phases, the polar caps on Mars, Jupiter and its four moons, and Saturn with its rings plainly visible. It can also be used as a land-based spotting telescope for daytime and wildlife observations.Maksutov-Cassegrain Optical Design:- The MAK is a catadioptric telescope, which means the optical design includes both a lens and a mirror. The light coming through a MAK passes through the corrector lens to the primary mirror and back to a spherical secondary mirror before it hits the eyepiece. Images are bright, sharp, and virtually free of chromatic aberration. The Maksutov-Cassegrain's optical design offers several unique benefits. Instead of a secondary mirror, the MAK features a secondary spot of reflective coating applied directly to the inside of the corrector plate. Because of this, the telescope does not require frequent collimation like a Schmidt-Cassegrain. Also, the secondary spot is significantly smaller than a traditional Schmidt-Cassegrain secondary mirror, giving the MAK its signature high-contrast views.One important thing to note about Maksutov-Cassegrain telescopes is that the larger, heavier Maksutov corrector plate takes longer to cool down and adjust to ambient air temperature compared to a Schmidt-Cassegrain of the same aperture.Accessories Included:- Your telescope includes a StarPointer™ red dot finderscope, a star diagonal, and two eyepieces (25mm and 9mm). The two eyepieces offer different magnifications for low- or high-powered observing. The star diagonal provides a right-side-up view and a more comfortable viewing angle when looking up at the sky. The StarPointer™ red dot finderscope will help you quickly center an object in your eyepiece for easier observing.Features:- High quality 90mm Maksutov-Cassegrain- Fully computerized Altazimuth mount- StarPointer finderscope to help with alignment and accurately locating objects- Quick-release fork arm mount, optical tube and accessory tray for quick no tool set up- Sturdy stainless steel tripod and accessory tray included- Perfect for terrestrial and celestial observingSpecifications:Optical Tube Info: - Optical Design: Maksutov-Cassegrain- Aperture: 90mm (3.54´´)- Focal Length: 1250mm (49´´)- Focal Ratio: f/14-