C9 1/4-SGT (XLT) Computerized - Telescope CELESTRON - Free user manual and instructions
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| Product Type | Telescope |
| Brand | Celestron |
| Model | C9 1/4-SGT (XLT) Computerized |
| Optical Design | Schmidt-Cassegrain |
| Aperture | 9.25 inches (235 mm) |
| Focal Length | 2350 mm |
| Focal Ratio | f/10 |
| Highest Useful Magnification | 555x |
| Mount Type | Computerized Alt-Azimuth fork mount |
| Alignment Method | SkyAlign |
| Object Database | 40,000+ celestial objects |
| Tracking Rates | Sidereal, Solar, Lunar |
| Power Supply | 12V DC (AC adapter included or optional battery pack) |
| Optical Tube Weight | 20 lb (9.1 kg) |
| Assembled Weight (with tripod) | 45 lb (20.4 kg) |
| Assembled Dimensions | Height: 36 in (91 cm); Width: 20 in (51 cm); Depth: 24 in (61 cm) |
| Included Accessories | 40mm and 25mm eyepieces, StarPointer finderscope, star diagonal, heavy-duty tripod |
| Maintenance and Cleaning | Use lens cleaning solution and optical tissue; avoid touching optics |
| Safety | Never look directly at the Sun without a proper solar filter |
| Spare Parts and Repairability | Available from authorized Celestron dealers |
Frequently Asked Questions - C9 1/4-SGT (XLT) Computerized CELESTRON
How do I align the C9 1/4-SGT telescope?
To align the telescope, use the SkyAlign procedure: set up the tripod and level it, then point the telescope at any bright celestial object. Use the hand control to select three bright stars. The telescope automatically calculates its position and begins tracking.
Can I take photos with this telescope?
Yes, the C9 1/4-SGT is suitable for astrophotography. With an optional T-adapter and camera, the computerized mount tracks celestial objects, allowing long-exposure images of planets, the Moon, and deep-sky objects.
What is the maximum magnification?
The maximum useful magnification is around 555x, depending on atmospheric conditions. For the best views, start with low-power eyepieces and gradually increase magnification as seeing allows.
How do I clean the optical surfaces?
For dust, use a soft brush or air blower. For grime, apply lens cleaning solution with optical tissue, wiping gently in a circular motion. Avoid touching the mirrors or corrector plate directly.
Does the mount require external power?
Yes, the mount operates on 12V DC power. An AC adapter is included, and you can use an optional 12V battery pack or car adapter for portable observing.
Can I update the object database?
The hand control has a flash-upgradeable firmware. You can download the latest updates from the Celestron website and transfer them via the computer port using the appropriate cable.
Is this telescope good for beginners?
It is recommended for advanced beginners because the GoTo computerized system simplifies finding objects. However, understanding basic astronomy concepts will enhance the user experience.
What accessories are included?
The package includes a 40mm and 25mm eyepieces, a StarPointer finderscope, a star diagonal, and a heavy-duty tripod, giving you a complete setup for visual observing.
What is the best way to observe the Sun?
Never look at the Sun without a dedicated solar filter mounted over the front aperture. Use a filter specifically designed for Schmidt-Cassegrain telescopes to ensure safe solar observation.
How do I maintain the telescope?
Keep the optics covered when not in use, store in a dry place, and periodically collimate the optical system if alignment seems off. Check screws and mount stability regularly.
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USER MANUAL C9 1/4-SGT (XLT) Computerized CELESTRON
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Product information
Brand : CELESTRON
Model : C9 1/4-SGT (XLT) Computerized
Category : Telescope