Comparison
The Celestron NexStar 127SLT emerges as the winner for most amateur astronomers. Its larger 127mm aperture and computerized GoTo mount provide significantly better light-gathering power and ease of use, reflected in its substantially higher overall score of 80 versus 63. The single most important differentiator is the GoTo tracking system; the Celestron finds and tracks objects automatically, while the Explore Scientific ED80 requires manual location and tracking on its equatorial mount.
The Celestron NexStar 127SLT suits observers who want convenience and versatility across multiple observing interests without constant manual adjustments. The Explore Scientific ED80 Essential Series is better for experienced observers prioritizing visual clarity on bright targets and maximum portability for travel or hiking. Given the modest $47 price difference, the Celestron's superior aperture, automated capabilities, and broader performance across planetary and deep-sky observing make it the stronger recommendation for typical amateur astronomers.
Choose the Explore Scientific only if you specifically need an extremely lightweight, portable refractor for travel or have strong preferences for refractor optical qualities, but expect a steeper learning curve on the equatorial mount.
Why choose Celestron NexStar 127SLT
Why choose Explore Scientific ED80