Used - NexStar 90SLT Computerized Telescope
Item #: U22087 / 22087-CGLPlease note: This is a gently used item. For complete product details, specs, and extras, please visit the original product page.
Gently Used, Fully Trusted
At Celestron, we believe the cosmos should be within everyone’s reach. That’s why our gently used items have been rigorously inspected and are in full working order—even if they show a few signs of past adventures. When you purchase this product, you’ll also enjoy the same comprehensive warranty as our new items, giving you confidence and peace of mind to explore the night sky.
Clear skies and happy stargazing!
Overview
Please note: This is a gently used item. For complete product details, specs, and extras, please visit the original product page.
Gently Used, Fully Trusted
At Celestron, we believe the cosmos should be within everyone’s reach. That’s why our gently used items have been rigorously inspected and are in full working order—even if they show a few signs of past adventures. When you purchase this product, you’ll also enjoy the same comprehensive warranty as our new items, giving you confidence and peace of mind to explore the night sky.
Clear skies and happy stargazing!
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Description
Specifications
| Optical Tube Info: | |
|---|---|
| Optical Design: | Maksutov-Cassegrain |
| Aperture: | 90mm (3.54") |
| Focal Length: | 1250mm (49") |
| Focal Ratio: | f/14 |
| Focal Length of Eyepiece 1: | 25mm (0.98") |
| Magnification of Eyepiece 1: | 50x |
| Focal Length of Eyepiece 2: | 9mm (0.35") |
| Magnification of Eyepiece 2: | 139x |
| Finderscope: | StarPointer™ red dot finderscope |
| Star Diagonal: | 1.25 |
| 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) |
| Optical Coatings: | Fully Coated |
| Mount Info: | |
| Mount Type: | Motorized Altazimuth |
| Accessory Tray: | No Tool, Quick release |
| Tripod: | Steel |
| 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 |
| NexStar+ Database: | 40,000 Object Database |
| GPS: | Optional SkySync GPS Accessory (93969) |
| Software: | Celestron Starry Night Special Edition Software and SkyPortal App |
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FAQ
Why doesn’t my red dot finderscope match the image on the box/website?
Celestron is making a change to the finderscope shipped with some Celestron telescopes. In some cases, you may receive a finderscope that is different in appearance than the one pictured on the gift box, manual, Quick Setup Guide, or website. We apologize for any inconvenience this may cause. Rest assured that the finders are identical in performance and features. The main difference is the location of the battery compartment and, therefore, the battery installation instructions.
If your red dot finderscope looks like the unit pictured here, you can ignore this message. 
If you received a red dot finderscope that looks like the unit pictured here, follow the instructions below to replace the battery: 
1. The battery compartment on this finderscope is located on top of the unit. Use a Philips-head screwdriver to loosen the screw holding the battery door closed. The screw is captured and will not fall out when you open the battery door. 
2. Lift the battery door open to expose the CR-2032 button battery.
3. With your fingernail on either side of the battery, pry the battery up and out of the battery compartment.
4. Place the new CR-2032 battery, positive (+) side up, under the two copper battery clips at the front of the battery compartment. 
5. Press the battery down to snap it into the plastic battery clips on the opposite side of the battery.
6. Close the battery door and tighten the Phillips-head screw to secure the door in place.
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