Celestron StarSense Explorer DX 102AZ - Smart phone app-enabled refractor telescope

The Celestron StarSense Explorer DX 102AZ combines substantial 102mm refractor performance with effortless StarSense navigation, giving you a telescope that can deliver genuinely impressive views while remaining remarkably straightforward to use.

Its large 102mm objective gathers enough light to make the night sky feel noticeably richer. Star clusters become brighter and more populated, nebulae stand out more clearly, and sweeping through the southern Milky Way reveals dense fields of stars with real visual impact. Planets add another dimension, with Saturn, Jupiter and Mars all providing rewarding detail when conditions allow.

The relatively short 660mm focal length gives the DX 102AZ a broad field of view that is particularly well suited to larger celestial objects and rich areas of sky. From New Zealand, this makes targets such as the Carina Nebula, Southern Pleiades, Jewel Box Cluster, Omega Centauri and 47 Tucanae especially enjoyable to explore.

StarSense Explorer makes finding them remarkably straightforward. The app shows you objects currently available to observe, lets you choose something that interests you, then guides you towards it as you move the telescope manually. You can begin exploring without first having to learn constellations, star charts or traditional star-hopping.

Celestron's XLT optical coatings help maximise light transmission through the 102mm objective, while the DX mount adds geared slow-motion controls on both axes for precise positioning once you reach your target.

And the DX 102AZ is genuinely useful beyond astronomy. The supplied erect-image diagonal gives a correctly oriented view for birds, wildlife, boats, coastlines, landscapes and other distant subjects, while the broad-field refractor design makes locating and following terrestrial targets natural and straightforward.

For someone wanting a telescope with real visual impact, easy StarSense navigation and excellent daytime versatility, the DX 102AZ is a very strong all-round choice.

Why Choose the StarSense Explorer DX 102AZ?

• Substantial 102mm aperture — delivers brighter, richer views of star clusters, nebulae, planets and dense Milky Way star fields.
• Excellent all-round astronomy performance — enough aperture to make deep-sky observing genuinely rewarding while remaining highly enjoyable on the Moon and planets.
• Broad-field f/6.5 design — particularly well suited to larger celestial objects and sweeping through rich areas of the night sky.
• StarSense smartphone guidance — see what is currently observable and let the app guide you towards your chosen target.
• Excellent day-and-night versatility — use the same telescope for astronomy, wildlife, boats, landscapes and distant scenery.
• Celestron XLT optical coatings — improve light transmission to help make the most of the 102mm objective.
• Dual-axis slow-motion controls — provide precise manual movement in both altitude and azimuth.
• Straightforward refractor design — easy to use and relatively low maintenance.
• No telescope power supply required — StarSense provides the navigation, while the telescope and mount remain completely manual.

What Can You See?

The DX 102AZ gives you an impressive range of astronomical targets to explore.

Star clusters are a particular strength. The Southern Pleiades and Jewel Box Cluster reveal attractive groups of individual stars, while Omega Centauri and 47 Tucanae appear as striking concentrations of starlight. Sweep through the southern Milky Way and entire fields can become filled with stars.

Bright nebulae add another dimension. The Carina Nebula is an outstanding New Zealand target, particularly away from strong city lighting, while the Orion Nebula provides another bright and rewarding view at the appropriate time of year. The telescope's broad field allows you to appreciate these objects together with the surrounding star fields rather than seeing only a narrow section of sky.

Planets provide a completely different observing experience. Saturn's rings are clearly recognisable, Jupiter shows its four bright Galilean moons and, under good conditions, its main cloud belts. Mars appears as a distinct reddish disc when favourably positioned, while the Moon reveals extensive detail across craters, mountain ranges, ridges and shadows.

The supplied 25mm and 10mm eyepieces provide 26x and 66x magnification, an excellent range for the telescope's broad-field observing character. Additional magnification can be added later with suitable optional eyepieces or a Barlow lens when the target and atmospheric conditions suit it.

You do not need remote dark skies every time you want to observe. Planets, the Moon, double stars and many star clusters remain worthwhile from towns and cities, while darker skies allow bright nebulae and rich Milky Way fields to show more of what the 102mm optics can reveal.

Daytime Viewing

The DX 102AZ is also an excellent long-distance daytime telescope.

The supplied 90° erect-image diagonal gives an upright, correctly oriented view, making the telescope well suited to birds, wildlife, boats, coastlines, hills, mountain features and landscapes.

Its relatively broad field of view makes locating and following terrestrial subjects easy, while the 102mm objective provides bright, detailed views when atmospheric conditions allow.

Once you have located your subject, the DX mount's slow-motion controls allow precise adjustments in both directions.

StarSense navigation itself is designed for the night sky, so daytime targets are located manually using the red-dot finder and telescope mount.

How StarSense Explorer Works

StarSense Explorer uses your smartphone camera to recognise star patterns overhead and determine where the telescope is pointing.

After the initial setup, the app displays objects currently available to observe. Select a target and follow the on-screen arrows as you move the telescope by hand. When the bullseye turns green, the object should be within the telescope's low-power field of view.

StarSense does not move or automatically track the telescope. It provides the navigation while you remain in control.

The DX mount then gives you geared slow-motion adjustment on both axes, making it easy to centre the object and follow it through the eyepiece.

FAQ's

What is the StarSense Explorer DX 102AZ particularly good for viewing?

Its 102mm aperture and relatively short 660mm focal length make it particularly enjoyable for star clusters, bright nebulae, rich Milky Way fields and other larger night-sky targets. The Moon and planets are also rewarding, giving the DX 102AZ excellent all-round visual capability.

Can I use the DX 102AZ during the day?

Yes. The supplied erect-image diagonal gives a correctly oriented terrestrial view, making the telescope excellent for wildlife, boats, landscapes and other distant subjects.

Does StarSense automatically move or track the telescope?

No. StarSense guides you towards your chosen target, but you move the telescope yourself. Once on target, the DX mount's dual-axis slow-motion controls provide precise manual positioning and make following objects easier.

Smartphone Compatibility

The Celestron StarSense Explorer app is available for supported iPhone and Android smartphones. Because phone and operating-system requirements change over time, we recommend checking Celestron's current StarSense Explorer compatibility information before purchase.

 Everything You Need to Observe Immediately

When you unbox your new StarSense Explorer DX, you’ll find:

• 102mm refractor optical tube
• StarSense dock for your smartphone
• Low powered (25mm) and high powered (10mm) eyepiece
• 90-degree erect image diagonal
• StarPointer red dot finderscope, perfect for using the telescope during the day or without the StarSense Explorer app
• Altazimuth mount with slow motion controls
• Full-height tripod with an accessory tray to keep you organized 

StarSense Explorer App Manual

StarSense Explorer DX 102AZ Quick Setup Guide