90LCM Computerized - Telescope CELESTRON - Free user manual and instructions
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| Product Type | Computerized Telescope |
| Brand | Celestron |
| Model | 90LCM Computerized |
| Aperture | 90 mm (3.5 in) |
| Focal Length | 1250 mm |
| Focal Ratio | f/13.9 |
| Optical Design | Maksutov-Cassegrain |
| Mount Type | Computerized Alt-Azimuth Single Fork Arm |
| GoTo Capability | Yes, with 40,000+ object database |
| Finderscope | Built-in EZ Finder II red dot finder |
| Eyepieces Included | 20 mm (62.5x) and 10 mm (125x) |
| Star Diagonal | 90° erect image diagonal |
| Power Supply | 8x AA batteries (not included) or optional AC adapter |
| Dimensions (Tube Length) | 35.6 cm (14 in) |
| Weight (Tube Assembly) | 1.5 kg (3.3 lb) |
| Tripod Weight | 3.2 kg (7 lb) |
| Total Weight | 4.7 kg (10.3 lb) |
| Highest Useful Magnification | 213x |
| Limiting Stellar Magnitude | 12.3 |
| Resolution (Rayleigh) | 1.55 arcsec |
| Warranty | 2 years limited |
Frequently Asked Questions - 90LCM Computerized CELESTRON
How do I set up the Celestron 90LCM for the first time?
Unpack the telescope, extend the tripod legs, attach the mount head, and secure the optical tube. Insert 8 AA batteries into the mount. Power on the hand controller and follow the alignment prompts.
What does the 'LCM' stand for?
LCM stands for 'Lightweight Computerized Mount', designed for portability and easy setup.
How do I align the telescope?
Use the 'SkyAlign' procedure: point the telescope at three bright objects (stars, planets, or the Moon) and confirm each alignment. The mount will then synchronize to the sky.
Can I use the telescope without the computer?
Yes, you can manually move the telescope by releasing the clutches. However, the GoTo function and tracking will be disabled.
What eyepieces are included?
The telescope comes with a 20 mm (62.5x magnification) and a 10 mm (125x magnification) eyepiece.
How do I clean the optics?
Use a soft brush or compressed air to remove dust. For smudges, use a lens cleaning solution and microfiber cloth. Never rub dry.
What celestial objects can I see?
With a 90 mm aperture, you can observe the Moon, planets (Jupiter, Saturn, Mars), brighter deep-sky objects like the Orion Nebula and Andromeda Galaxy, and star clusters.
Does the telescope have a built-in battery?
No, it requires 8 AA batteries (not included) or an optional AC adapter (12V, 1A).
How do I update the hand controller firmware?
Download the latest firmware from Celestron's website, connect the hand controller to a PC via the RS-232 cable (sold separately), and use the firmware update tool.
What is the warranty period?
Celestron offers a 2-year limited warranty for defects in materials and workmanship.
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