Celestron StarSense Explorer™ DX 102AZ Smartphone App-Enabled Refractor Telescope

StarSense Explorer: Find Objects in Under 2 Minutes

Celestron has eliminated the steepest learning curve in amateur astronomy: knowing where to point your telescope. StarSense Explorer uses your smartphone's camera and a patented Lost in Space Algorithm (LISA) to precisely determine its position against the stars. After a simple 2-minute alignment, the app displays a list of currently visible objects; just select one, and on-screen arrows guide you to your target until the bullseye turns green.

Unlike other apps that rely on less accurate phone gyros, StarSense uses real-time sky recognition. This technology is far more precise, ensuring that when the app says an object is in the eyepiece, it actually is. It's the most intuitive and accurate manual pointing system available, making it perfect for beginners navigating the sky for the first time.

102mm Refractor with XLT Coatings: 212x More Light Than Your Eye

At the heart of the DX 102AZ is a classic refractor design with a large 102mm (4.01") objective lens. This aperture provides a Dawes' limit resolution of 1.14 arc seconds, sharp enough to split tight double stars and reveal detail in Jupiter's cloud bands. The f/6.5 focal ratio offers a wide field of view, ideal for framing large targets like the Pleiades (M45) or the Andromeda Galaxy (M31).

• Fully XLT Coated Optics: Celestron’s premium XLT coatings increase light transmission, resulting in brighter, higher-contrast images than standard coated lenses. This makes a visible difference when observing faint nebulae or galaxies.
• Day-to-Night Viewing: The included 90° erect image diagonal provides correctly oriented views, making the telescope a fantastic tool for terrestrial observation of birds, wildlife, and landscapes during the day.

Alt-Azimuth Mount: Smooth Manual Tracking with Slow-Motion Controls

A great telescope requires a stable mount. The StarSense Explorer DX 102AZ is supported by a sturdy, full-height alt-azimuth mount and tripod. Its strength lies in its simplicity and intuitive operation—simply move the tube up, down, left, and right to find your target.

The crucial upgrade on this mount is the inclusion of dual-axis slow-motion controls. As an object drifts due to Earth's rotation, you can make fine adjustments with the turn of a knob to keep it perfectly centered in the eyepiece. This smooth, geared control is essential for relaxed, high-magnification viewing of planets and the Moon.

Grab-and-Go at 14.2 lbs: A Complete Kit for Any Location

Weighing a mere 14.2 lbs fully assembled, the DX 102AZ is exceptionally portable. It's easy to carry from your home to the backyard or pack in the car for a trip to a dark sky site. The kit is designed for immediate use, including everything you need to start observing moments after opening the box.

• Two Eyepieces: A 25mm eyepiece provides a wide 26x view for locating objects, while the 10mm eyepiece boosts the power to 66x for detailed inspection of planetary features and globular clusters.
• StarPointer Finderscope: For those times you want to observe without the app, a classic red dot finderscope is included for easy manual aiming.
• Accessory Tray: A convenient tray attaches to the tripod to keep your eyepieces, filters, and phone organized and within reach.

StarSense Explorer DX 102AZ vs. DX 130AZ: Refractor Contrast or Reflector Aperture

Within the StarSense Explorer DX series, a common choice is between this 102mm refractor and the 130mm reflector. While both use the same brilliant app technology, their optical designs create different observing experiences.

• DX 130AZ Reflector Advantage: With a larger 130mm aperture, the reflector gathers more light, making it better for resolving faint deep-sky objects like galaxies and nebulae. If maximizing brightness on faint fuzzies is your goal, the 130AZ has the edge.
• DX 102AZ Refractor Advantage: Refractors are known for their sharp, high-contrast views, which excel on bright targets like the Moon, planets, and double stars. The sealed tube requires no maintenance (like collimation), and its images are typically crisper edge-to-edge, which many observers prefer for planetary detail.