Celestron Review 2026
Celestron StarSense Explorer LT 70AZ Review 2026: The Smartest Beginner Telescope in the UK?
we researched the Celestron StarSense Explorer LT 70AZ using specifications and UK owner feedback to find out whether smartphone plate-solving really makes this the easiest first telescope for complete beginners.
Updated 9 September 2026 · By TelescopeReviews UK
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Quick Verdict
⭐⭐⭐⭐ 4.3/5 — RECOMMENDED
The Celestron StarSense Explorer LT 70AZ solves the biggest problem in beginner astronomy — not knowing where to look. The smartphone navigation system genuinely works, consistently guiding even complete beginners to objects they would spend frustrated hours trying to find manually. For UK beginners who want results on their first night out, this is the most immediately rewarding telescope we have compared.
- ✅Buy if: You are a complete beginner who wants help finding objects without paying for a full GoTo motor
- ❌Skip if: Deep-sky views are your priority — the Heritage 130P gives more aperture for the same budget
Key Specifications
| Optical design | Achromatic refractor |
| Aperture | 70mm |
| Focal length | 700mm |
| Focal ratio | f/10 |
| Mount type | Alt-azimuth (manual) |
| StarSense dock | Yes — smartphone required |
| Eyepieces included | 10mm and 25mm (1.25 inch) |
| Finder | StarSense dock (replaces finder) |
| Weight | 3.3kg (assembled) |
| Tripod | Included |
| Smartphone required | Yes — iOS or Android |
Build Quality and Design
The StarSense Explorer LT 70AZ pairs a metal optical tube with a lightweight aluminium tripod. Tripod stability depends on leg extension and the supporting surface; vibration can affect views at higher magnifications.
For fit and phone-case compatibility, check the manufacturer's current guidance for your smartphone and case.
📱 StarSense Compatibility
- Compatible: Most iOS and Android smartphones without cases, or with cases under 10mm
- Not compatible: Very large tablets, phones over 90mm wide
- App: Free download, Celestron StarSense Explorer app
- Internet: Not required once downloaded
StarSense Navigation — How It Works
The StarSense technology is genuinely clever. The dock positions your smartphone's camera to look at the same part of the sky as the telescope. The app takes a photo of the star field, compares it to its database of 200,000 stars, and identifies exactly where the telescope is pointing — a process called plate-solving.
The app then displays an arrow and distance indicator showing which direction to move the telescope to reach your chosen target. Move the telescope until the arrow disappears and the target is centred — then look through the eyepiece.
💡 No Motors, No Batteries
The StarSense system requires NO batteries in the mount — only your smartphone battery. This is a significant advantage over GoTo telescopes on cold UK winter nights when batteries drain quickly. The mount itself is entirely manual.
Setup and First Light
Step 1 — Assemble tripod
Extend the three tripod legs and secure with the wing nuts. Attach the alt-azimuth head. 3 minutes.
Step 2 — Attach optical tube
Slide the tube into the dovetail bracket and tighten. 1 minute.
Step 3 — Attach StarSense dock
Clip the dock onto the bracket above the focuser. Insert your smartphone. 30 seconds.
Step 4 — Open the app
Launch the StarSense Explorer app. It will ask to access your camera and location — allow both. The app initialises automatically.
Step 5 — Select a target
Choose any object from the app's catalogue. Follow the arrow displayed on screen, moving the telescope until the target indicator centres. Look through the eyepiece.
💡 Setting Up and First Use
The simple design suits beginners with no astronomy experience. Using the quick-start card and downloading the app, a newcomer can typically find a target such as Jupiter independently within minutes of opening the box, which makes for an engaging first night of observing.
What You Can Expect to See
The Moon
At 28x (25mm eyepiece): If conditions are suitable, you may see the full lunar disc with a distinct terminator and clear contrast.
At 70x (10mm eyepiece): If seeing is steady, you may distinguish individual craters and shadows across mountain ranges.
Saturn
At 70x: If conditions are suitable, you may see Saturn's rings separate from its disc and notice its creamy colour; Titan may be detectable on clearer nights.
Jupiter
At 70x: If conditions are suitable, you may see Jupiter's disc, two main cloud bands and four Galilean moons as points of light.
Double Stars
At 70x: If conditions are suitable, you may notice Albireo's blue and gold colour contrast; separating the Double Double in Lyra may require particularly steady seeing.
Orion Nebula (M42)
At 28x: If conditions are suitable, you may see a bright core, surrounding nebulosity and resolved Trapezium stars.
StarSense Accuracy in UK Conditions
Owner feedback suggests the StarSense navigation performs reliably across varied real-world conditions.
| Condition | Setup consideration | Pointing expectation | Suggested action |
|---|---|---|---|
| Clear, calm night | Clear view of stars | Depends on setup | Check centring |
| Partly cloudy (gaps) | Wait for clear gaps | May need adjustment | Check visibility |
| Light rain | Protect equipment | Conditions may interfere | Follow care guidance |
| After moving telescope | Recheck phone setup | Pointing may shift | Check centring |
⚠️ UK-Specific Tip
The StarSense app needs a clear view of stars to plate-solve. On partly cloudy nights, wait for a clear gap before selecting your target — the app cannot solve through cloud. On nights of poor transparency (misty or hazy), accuracy drops slightly as fewer stars are visible to match.
Who Should Buy This Telescope?
✅ YES — Buy the StarSense LT 70AZ if:
- You are a complete beginner
- Finding objects manually frustrates you
- Portability is important
- You want results on your first night
- Budget is under £200
- A child aged 10+ will use it
❌ NO — Consider alternatives if:
- Deep-sky objects are your priority → Sky-Watcher Heritage 130P
- You want GoTo tracking → Celestron NexStar 130SLT
- Planetary detail matters most → Celestron Astro Fi 102 Maksutov
- Budget is over £250 → NexStar 130SLT adds tracking
Alternatives to Consider
Sky-Watcher Heritage 130P FlexTube
More aperture, better deep-sky views, lower price. Better value if you are happy to star-hop manually.
Celestron NexStar 130SLT
Full GoTo motorised tracking — finds and follows objects automatically. Better for observers who want automation.
Celestron StarSense Explorer DX 130AZ
Same StarSense navigation with a larger 130mm aperture — the natural upgrade from the LT 70AZ.
Frequently asked questions
🏆 Our Final Verdict
The Celestron StarSense Explorer LT 70AZ is the telescope we recommend to complete beginners who ask "how do I actually find anything?" The navigation system works reliably, the 70mm refractor delivers sharp lunar and planetary views, and the entire experience from unboxing to first light is the most beginner-friendly we have compared. It will not give the deep-sky views of larger aperture telescopes — but for a first telescope that keeps beginners engaged from night one, nothing else at this price comes close.
Rating: ⭐⭐⭐⭐ 4.3/5
Recommended for: Complete beginners, gift buyers, children aged 10+, anyone frustrated by not finding objects
Disclosure: we compared this telescope independently. Links to Amazon are affiliate links — we earn a small commission at no extra cost to you. Read our full disclosure.
At a glance
4.3/5
Recommended for UK beginners
- ✓ Smartphone navigation works
- ✓ No mount batteries needed
- ✓ Sharp lunar/planetary views
- ✕ Limited deep-sky detail
- ✕ Phone required for navigation