"Celestron NexStar 90SLT Brand New Includes Two Year Warranty, The Celestron 22087 is a 3.54-inch Maksutov-Cassegrain telescope with a sturdy stainless steel tripod and accessory tray and fully computerized GoTo Altazimuth mount with quick-release fork arm, optical tube and accessory tray for quick no tool set up
The 3.54-inch aperture provides excellent light-gathering ability and SkyAlign technology gets your telescope aligned and ready to observe in minutes.The telescope includes NexRemote telescope control software and RS-232 cable for advanced control of the telescope with a PC. The Celestron 22087 features SkyAlign allows alignment on any three bright celestial objects, making for a rapid, efficient alignment process and StarPointer finderscope helps with alignment and locating objects. It comes with a flash upgradeable hand control software and motor control units for downloading product updates over the Internet and internal battery compartment to prevent cord wrap during use. 22087 Features: 3.54 Inch Aperture (90mm), Computerized With 4, 000 Accessible Objects, 213x Maximum Magnification, Focal Length: 1250mm, f/14.0 Focal Ratio, StarPointer Finderscope, Steel Tripod, Motorized Altazimuth Mount, NexRemote, SkyAlign Technology - Allows To Align On Any 3 Bright Celestial Objects - Making Fast & Easy Alignment Process, Flash Upgradeable, 22087 Specifications: Optical Design: Maksutov-Cassegrain, Aperture (mm): 90 mm (3.54 in), Focal Length: 1250 mm (49 in), Focal Ratio: 14, Focal Length of Eyepiece 1 (mm): 25 mm (0.98 in), Magnification of Eyepiece 1: 50 x, Focal Length of Eyepiece 2 (mm): 9 mm (0.35 in), Magnification of Eyepiece 2: 139 x, Finderscope: StarPointer, Star Diagonal: 1.25, Mount Type: Motorized Altazimuth, Accessory Tray: No Tool, Quick release, Tripod: Steel, Highest Useful Magnification: 213 x, Lowest Useful Magnification: 13 x, Limiting Stellar Magnitude: 12.3, Resolution (Rayleigh): 1.55 arc seconds, Resolution (Dawes): 1.29 arc seconds, Light Gathering Power (Compared to human eye): 165 x, Apparent Field of View: 1, Linear Field of View (@1000 yds): 53 ft (16 m), Optical Coatings: Fully-Coated, Slew Speeds: Nine slew speeds, Tracking Rates: Sidereal, Solar and Lunar, Tracking Modes: Alt-Az, EQ North and EQ South, Alignment Procedures: SkyAlign, Auto 2-Star Align, 1-Star Align, 2-Star Align, Solar System Align, Computer Hand Control: Fully Computerized / Flash Upgradeable, Database: 4, 000 Object Database, GPS: Optional SkySync GPS Accessory (93969), Celestron 22087 Includes: 25 mm Eyepiece, 9.0 mm Eyepiece, StarPointer Finderscope, Computerized Altazimuth Mount, Hand Controller, 'The Sky' Level 1 CD-ROM, NexStar Observers List CD-ROM"