Celestron‘s StarSense Explorer LT 70AZ positions itself as the entry point to a telescope line that uses smartphone technology to locate celestial objects in real time. After hands-on testing, the 70mm refractor earns its reputation as a capable, accessible instrument for new and returning observers alike.
Design and Build
At 7.4 lbs (3.35 kg), the LT 70AZ is light enough to carry to a dark site and set up quickly. A family member with minimal telescope experience assembled the unit in under 10 minutes, without consulting the manual. That alone says something about how the telescope is designed.
The build quality reflects the price. At just under $269, some components cut corners visibly. The star diagonal is plastic, the tripod is not particularly sturdy, and the tube occasionally drooped during use, which made precise adjustments harder than they needed to be. The rack and pinion focuser is functional but difficult to fine-tune. These are real limitations, not minor quibbles.
On the positive side, the optics tell a different story. The glass is fully multi-coated, and the internal structure holds up well on inspection. Chromatic aberration around bright objects was present but not severe enough to undermine the viewing experience.
Performance
The LT 70AZ carries a 70mm aperture, a 700mm focal length, and an f/10 focal ratio. Two eyepieces ship with the unit: a 25mm delivering 28x magnification and a 10mm delivering 70x. Both ends of that range proved genuinely useful during testing.
Planetary detail within the solar system was a highlight. At higher magnifications, the optics delivered satisfying clarity on solar system targets. The multi-coated glass performs noticeably above what the price tag might suggest.
StarSense Technology and App Integration
The telescope’s defining feature is Celestron‘s patented StarSense sky recognition system. A dedicated phone dock attaches to the tube, and after downloading the free SkySafari app, the telescope calculates its position in real time by analysing star patterns through the smartphone camera. Navigating to targets then becomes a guided process, with the app directing the observer to align the telescope on whatever object they select.
Accuracy was strong throughout testing. The app connected reliably, and the pointing performance was consistently dependable. For a beginner who has never star-hopped manually, this system removes the single biggest frustration in amateur astronomy: finding things in the first place.
Availability and Alternatives
The LT 70AZ is increasingly difficult to source in the United States but remains available in the UK and Europe. American buyers can consider the Celestron StarSense Explorer LT 80AZ, which shares most of the same specifications but offers a larger aperture and continues to ship through US retailers.
For the price, the package is generous: two eyepieces, a phone dock, a finder scope bracket, and the StarSense technology come bundled together. The weaknesses are real, but they are the expected trade-offs at this price tier. As an entry point into telescope ownership, the LT 70AZ makes a strong case for itself.
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