Celestron NexStar 90SLT Computerized Telescope

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
Good for terrestrial and celestial observing
“TheSkyX – First Light Edition” astronomy software with a 10,000 object database, printable sky maps and 75 enhanced images


{Specification}

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) 

Warranty
2-year Telescope ...