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Designed for both astronomical and terrestrial use, Celestron's Omni XLT Alt-Az 4" f/6.5 Refractor Telescope is an ideal instrument to introduce beginner viewers to astronomy by giving them a complete setup for viewing the Moon, planets, meteor showers, and bright, deep-sky objects. Its manual alt-azimuth mount has slip clutches and slow-motion controls on both axes for precise tracking. The mount's single fork-arm design enables the optical tube to be aimed at or near the zenith for astronomical use, and pointed downward past the horizon for terrestrial viewing on a deck, through a window, or from an observational platform.
A 90° erector prism is included that corrects image inversion and flips for use on land. A single 1.25" diameter barrel eyepiece is included that yields 26x power or 78x with the included 3x Barlow lens. Any 1.25" eyepiece and accessory will fit the focuser and Barlow lens to add greater versatility to the scope. Its adjustable-height aluminum tripod provides a stable observation platform, and its maximum height of 49" allows for comfortable viewing by most users. An integrated dew-shield helps to prevent condensation on the objective lens, while blocking stray terrestrial peripheral light from interfering with celestial observations.
f/4.6 focal ratio
660mm focal length
Proprietary XLT anti-reflection coatings
Fully multicoated optics
Mount & Tripod
Manual single fork alt-az
Dual-axis slip clutches for fast pointing/aiming
Dual slow-motion cables
Point OTA at or near the zenith for astronomical use
Point OTA downward for terrestrial use on deck or window
Two-stage aluminum tripod with accessory tray
Adjustable height up to 49"
1.25" rack-and pinion-focuser
25mm Plossl eyepiece yields 26x power
3x Barlow lens triples the magnification of any eyepiece
90° erector prism corrects image orientation for terrestrial use
StarPointer Pro red-dot finderscope projects dual-circle reticle that won't obstruct distant objects
In the Box
Celestron Omni XLT Alt-Az 4" f/6.5 Refractor Telescope