The Celestron StarSense Explorer DX 130AZ is a 5.1-inch (130mm) Newtonian reflector telescope, part of Celestron’s StarSense Explorer line. This model is one of two 130mm f/5 reflectors offered by the company, with the other being a tabletop Dobsonian. The DX 130AZ features an alt-azimuth tripod and a 2-inch focuser, distinguishing it from other models in the series, which include Dobsonians, Schmidt-Cassegrains, refractors, and smaller telescopes. It is considered a strong performer in the StarSense Explorer range, offering a balance of portability and optical quality. Designed for both beginners and experienced stargazers, the DX 130AZ is on the smaller side of what’s considered a "serious" telescope but still offers impressive views of the moon, planets, and some deep-sky objects. It includes a manual alt-azimuth mount with slow-motion controls and a smartphone dock for the StarSense app, which helps with alignment and pointing. The telescope comes with two 1.25-inch eyepieces (25mm and 10mm) that provide magnifications of 26x and 65x, respectively. It has a 2.5-inch rack-and-pinion focuser that can accommodate a variety of eyepieces, though some may require a coma corrector for optimal performance. While the telescope is easy to set up and use manually, the mount's gears have some play, which may affect precision. Users should also be mindful of the telescope's orientation to prevent the optical tube from colliding with the tripod legs when pointing at high angles. Under good atmospheric conditions, the DX 130AZ can achieve magnifications of up to 250x, allowing for detailed views of the moon, Jupiter’s moons, Saturn’s rings, and even Uranus as a greenish disk. However, Neptune may be harder to spot without the help of the StarSense app. For deep-sky objects, the DX 130AZ performs best under dark, clear skies. It can reveal the spiral arms of the Andromeda Galaxy, the globular clusters M13 and M3, and open clusters like M11 and M35. Planetary nebulae are also visible, though their colors may be less vibrant due to the telescope’s smaller aperture. Using a nebula filter can improve visibility in areas with light pollution. The DX 130AZ is a portable and lightweight option, but it may not offer the most aperture or stability for the price compared to other models. It is ideal for users who want a portable telescope with the option of smartphone-guided pointing. Alternatives include the more compact and affordable Sky-Watcher Heritage 130P, or the larger, more stable Celestron StarSense Explorer 8-inch model. The Celestron Astro Fi 130 offers full GoTo and tracking features via a smartphone app, though it requires more setup time.