Celestron Omni XLT 102 Telescope
- 102mm (4.02") Refractor Optical Tube
- 1000mm Focal Length at f/9.8
- StarBright XLT Optical Coatings
- Omni CG-4 German Equatorial Mount
- 1.75" Stainless Steel Tripod
- Resolves down to 1.14 arc seconds (Dawes)
The Celestron Omni XLT 102 Telescope combines a 102mm refractor with the robust Omni CG-4 equatorial mount for high-magnification planetary and lunar observation. Its 1000mm focal length and f/9.8 ratio deliver the resolving power needed to split tight double stars, with a Dawes limit of 1.14 arc seconds. With StarBright XLT coatings enhancing light transmission and a limiting stellar magnitude of 12.5, this telescope provides sharp, high-contrast views of solar system and bright deep-sky targets.
At the heart of the Omni XLT 102 is a classic refractor design, prized for its crisp, unobstructed views. The 102mm (4.02") aperture gathers 212 times more light than the human eye, revealing faint details on Jupiter's cloud bands and resolving the Cassini Division in Saturn's rings. Celestron's proprietary StarBright XLT coatings are applied to the optics, maximizing light transmission for brighter images and improved contrast, which is critical for discerning subtle color variations on Mars or separating faint stars.
The long 1000mm focal length makes achieving high magnification straightforward with the included 25mm eyepiece (40x), while supporting magnifications up to 241x with additional eyepieces. This optical system is hand-figured to minimize spherical aberration, ensuring that stars focus to sharp points across the 1.25° apparent field of view.
A stable mount is essential for high-power viewing, and the Omni CG-4 delivers a solid foundation. This German equatorial mount, supported by a tripod with 1.75" stainless steel legs, handles the 9.5 lb optical tube with ease. The total weight of the tripod and counterweights (7 lbs and 4 lbs) provides the stability needed to keep images steady, even at the highest useful magnification of 241x.
The CG-4 mount features slow-motion controls on both axes, allowing you to make fine adjustments and manually track celestial objects as they move across the sky. Setting circles and a latitude scale help with faster setup and polar alignment, making it an excellent platform for learning the fundamentals of celestial navigation before stepping into astrophotography.
The Omni XLT 102 excels at detailed views of solar system objects. You can clearly resolve the cloud belts and Great Red Spot on Jupiter, the rings of Saturn, phases of Venus, and polar ice caps on Mars. Its 102mm aperture is also capable of revealing brighter deep-sky objects like the Orion Nebula (M42) and the Andromeda Galaxy (M31).
Yes, it's an excellent choice for a serious beginner. The manual CG-4 equatorial mount is a fantastic learning tool for understanding the motion of the sky and how to track objects. The high-quality refractor optics provide sharp, hassle-free views without the need for collimation that reflector telescopes require.
While an 8" SCT has more light-gathering power, the Omni XLT 102 refractor will often provide higher-contrast views due to its unobstructed optical path. This can make details like Jupiter's cloud bands or Saturn's rings appear sharper and more defined, especially when seeing conditions are less than perfect.
The Omni XLT 102 is suitable for basic astrophotography, particularly of the Moon and planets. The CG-4 mount is stable enough for short exposures. For long-exposure deep-sky imaging, you would need to add a motor drive to the mount for accurate tracking.
The telescope comes with a 25mm eyepiece (40x), which is great for finding objects. To take advantage of its 1000mm focal length for planetary viewing, consider adding a higher-power eyepiece in the 9mm to 12mm range. A 2x Barlow lens would also be a versatile accessory, doubling the magnification of any eyepiece you own.
First, use the included 6x30 finderscope to locate your target. Then, you can use the included Celestron Starry Night software or SkyPortal app on your phone to get the celestial coordinates (Right Ascension and Declination) of an object. By using the setting circles on the CG-4 mount, you can point the telescope to those coordinates for a more precise "star-hopping" experience.
| Optical Design | Refractor |
| Aperture | 102mm (4.02") |
| Focal Length | 1000mm (39") |
| Focal Ratio | f/9.8 |
| Optical Coatings | StarBright XLT |
| Highest Useful Magnification | 241x |
| Lowest Useful Magnification | 15x |
| Limiting Stellar Magnitude | 12.5 |
| Resolution (Rayleigh) | 1.37 arc seconds |
| Resolution (Dawes) | 1.14 arc seconds |
| Light Gathering Power | 212x (Compared to human eye) |
| Finderscope | 6x30 |
| Included Eyepiece | 25mm (40x Magnification) |
| Apparent Field of View | 1.25° |
| Linear Field of View (@1000 yds) | 66 ft (20 m) |
| Mount Type | Omni CG-4 Equatorial |
| Tripod | 1.75" Stainless Steel Legs |
| Optical Tube Length | 1003mm (39.5") |
| Optical Tube Weight | 9.5 lbs (4.31 kg) |
| Tripod Weight | 12.5 lbs (5.67 kg) |
| Counterweight(s) | 7 lbs (3.2 kg) and 4 lbs (1.8 kg) |
| Software | Celestron Starry Night Special Edition & SkyPortal App |
Omni XLT 102mm Refractor OTA
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CG-4 Equatorial Mount
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Tripod with 1.75" Steel Legs
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25mm Multi-Coated Eyepiece (1.25")
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1.25" Star Diagonal
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6x30 Finderscope
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7 lb Counterweight
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4 lb Counterweight
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Accessory Tray
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