Telescope is in brand new condition (only used once) with original packaging and in perfect working order. 9mm & 25mm eyepieces included
CELESTRON NEXSTAR 90SLT 90MM F/14 MAKSUTOV-CASSEGRAIN GO TO TELESCOPE
Designed as a highly portable and user-friendly entry- to mid-level astronomical observation platform, the Celestron NexStar 90SLT 90mm f/14 Maksutov-Cassegrain GoTo Telescope gives you the ability to make detailed observations of the Moon, with the ability to easily see planets and reach outside the solar system to resolve bright deep-space objects like galaxies, nebulae, and binary or variables stars.
The brain of the NexStar SLT is the venerable NexStar computer controller. Equipped with a database of over 4000 objects, including the planets, stars, nebulae, galaxies, and the complete Messier catalog, it can also be programmed with up to 99 custom user-defined objects and filters for custom object lists. Its intuitive menu-driven user interface provides the power to observe the heavens with nine slew speeds and three tracking rates, plus anti-backlash compensation.
Optical Tube
90mm aperture
f/14 focal ratio
1250mm focal length
Maksutov-Cassegrain optical design
Front convex meniscus lens corrects spherical and chromatic aberrations and comas (off-axis aberration) across the entire field of view
Compared to Schmidt-Cassegrains, a smaller secondary mirror reduces obstructions and increases contrast
Fully coated optics improve light transmission, color rendition, and contrast
NexStar Controller
4000+ object database
99 customizable user-defined objects
Expanded information on over 200 most popular objects including history, facts, and mythology
Tracking rates: Sidereal, Solar, Lunar
Nine slew speeds: 2x, 4x, 8x, 16x, 32x, 64x, 1°/sec, 2°/sec, 3°/sec
Anti-backlash compensation trains out the intrinsic play between gears to improve GoTo and tracking accuracy
Alignment procedures: Sky Align, Auto 2-star, 1-star, 2-star, Solar system
SkyAlign allows fast and easy alignment without having to polar align or even know the names of stars
Tour mode: Seeks out the best objects and automatically slews to them
Constellation Tour: Tour of the best objects within a specific constellation
Identify mode: Searches the database catalogs or lists and displays the name and offset distances to the nearest matching object
Flash upgradable via Internet
2-line/16-character LCD display with 19 backlit LED buttons
RS-232 communication port for updating or computer control
Mount and Tripod
Mount:
Single-arm fork design
Dual-axis DC servo motors
Optical encoders on motors improve GoTo and tracking accuracy; up to 0.26 arcsec accuracy
Internal battery compartment to prevent cord wrap during use
Hand control and motors are powered by eight user-supplied AA batteries or optional 12 VAC adapter
No-tool setup, complete quick release setup and breakdown
Tripod:
Sturdy stainless steel
Adjustable height accommodates a variety of users and observation positions
Spiked feet improve stability on soft or uneven ground
Movable hand controller holder prevents cord wrap during long-duration observation and astrophotography sessions
Tray holds accessories like eyepieces, filters, phones, and flashlights
