Celestron Omni XLT 120

Full review

The Celestron Omni XLT 120 stands as a refined achromatic refractor telescope designed for amateur astronomers who want crisp, high-contrast views of both celestial and terrestrial subjects. With a 120mm aperture and a focal length of 1000mm, this instrument gathers ample light while maintaining a manageable f/8.3 focal ratio, striking a balance between wide-field capability and the resolving power needed for lunar craters, planetary bands, and deep-sky objects like star clusters and bright nebulae. The optical tube features Celestron's proprietary XLT fully multi-coated lens system, which enhances light transmission and reduces internal reflections, resulting in sharper images with improved contrast compared to standard coated optics. The rack-and-pinion focuser ensures smooth, precise adjustments, allowing observers to dial in exact focus even at higher magnifications.

Mounted on a sturdy German equatorial mount, the Omni XLT 120 offers stable, vibration-resistant tracking that is essential for extended viewing sessions or astrophotography of brighter objects. The equatorial design allows for manual tracking of celestial objects as they move across the sky, compensating for Earth's rotation with smooth slow-motion controls on both axes. This setup is particularly beneficial for those transitioning from altazimuth mounts to more advanced equatorial systems, as it introduces essential skills for polar alignment and celestial tracking without the complexity of computerized go-to systems. The steel tripod legs provide a solid foundation, minimizing shake and ensuring that fine details remain steady in the eyepiece even during moments of higher magnification.

Included with the telescope are two eyepieces, typically a 25mm and a 9mm, offering a range of magnification options right out of the box, along with a 6x30 finderscope to help locate objects in the night sky quickly and accurately. The Omni XLT 120 is versatile enough to satisfy a variety of observing interests, from tracking the moons of Jupiter and the rings of Saturn to resolving double stars and viewing brighter deep-sky targets such as the Orion Nebula. Its achromatic lens design, while exhibiting minor chromatic aberration typical of refractors in this class, still delivers pleasing, natural-color images across a broad range of viewing conditions. For hobbyists seeking a dependable, moderately portable refractor that combines Celestron's respected optical engineering with a traditional equatorial mount, the Omni XLT 120 represents a solid investment in both immediate enjoyment and long-term growth within the hobby of astronomy.