Celestron NexStar 90SLT Computerised Telescope

Compact in footprint yet notably capable, the Celestron NexStar 90SLT is a computerised Maksutov-Cassegrain telescope with a 90mm aperture, 1250mm focal length and f/14 focal ratio on a computerised alt-azimuth mount. Its single fork arm design, pre-assembled adjustable steel tripod and no-tool setup make it a practical choice for regular observing without a lengthy assembly process.

The NexStar+ hand control gives access to a database of 40,000 celestial objects, while SkyAlign technology streamlines alignment by using three bright objects in the sky. Supplied with 25mm and 9mm eyepieces, this model delivers 50x and 139x magnification, with a highest useful magnification of 213x. A StarPointer red dot finderscope and 1. 25-inch star diagonal are also included. The 90SLT is suited to lunar, planetary and terrestrial observing, and it can be powered by 8 AA batteries or by a 12V AC adapter sold separately.

Key features

• 90mm Maksutov-Cassegrain optical tube
• Computerised alt-azimuth mount with single fork arm
• 1250mm focal length with f/14 focal ratio
• NexStar+ hand control with 40,000-object database
• SkyAlign alignment technology
• Fully-coated optics
• Pre-assembled adjustable steel tripod with quick-release accessory tray
• 2-year warranty
• Model number: 22087-CGL

Specifications

Optics

• Optical design: Maksutov-Cassegrain
• Aperture: 90mm
• Focal length: 1250mm
• Focal ratio: f/14
• Optical coatings: Fully-Coated
• Highest useful magnification: 213x
• Lowest useful magnification: 13x
• Limiting stellar magnitude: 12. 3
• Resolution (Rayleigh): 1. 55 arc seconds
• Resolution (Dawes): 1. 29 arc seconds
• Light gathering power (compared to human eye): 165x
• Apparent field of view: 1
• Linear field of view (@1000 yds): 53 ft (16 m)
• Eyepiece 1 focal length: 25mm
• Eyepiece 1 magnification: 50x
• Eyepiece 2 focal length: 9mm
• Eyepiece 2 magnification: 139x
• Star diagonal: 1. 25-inch
• Finderscope: StarPointer red dot finderscope

Mount

• Mount type: Computerised alt-azimuth
• Slew speeds: Nine slew speeds
• Tracking rates: Sidereal, Solar and Lunar
• Tracking modes: Alt-Az, EQ North and EQ South
• Accessory tray: No tool, quick release

Build

• Tripod: Steel
• Weight: 11. 88 kg

In the box

• StarPointer red dot finderscope
• 1. 25-inch star diagonal
• 25mm eyepiece
• 9mm eyepiece
• Pre-assembled adjustable steel tripod
• Quick-release fork arm mount
• Accessory tray
• Starry Night Special Edition Astronomy Software download

Support & warranty

• 2-year warranty

Rackhams Reference : 5QBJ5L24N1