Rank #1 in Best Telescopes 2026: 10 Ranked, and the Specs That Don't Add Up
Celestron NexStar 130SLT Computerised Reflector
- Rating
- 4.3
- Ratings
- 2,118
- Rank
- #1
Price and rating as shown on Amazon when we collected them. Both change.
The Celestron NexStar 130SLT sits at number one in this guide. It is a computerised Newtonian reflector on a quick-release altazimuth fork mount, listed at £499.00 and rated 4.3 out of 5 from 2,118 ratings. The listing puts its object database at more than 40,000 stars, galaxies and nebulae, and describes a SkyAlign routine that aligns on any three bright objects.
What the same listing does not do is agree with itself on the optics. The aperture is given as 130 mm and the focal length as 325 mm, which is f/2.5 — a ratio you do not find on a 130 mm reflector. The optical tube length is then listed at 635 mm, close to double the focal length quoted. Two further figures sit oddly: a 26 mm exit pupil over a 130 mm aperture works out at 5x, and the field of view is given as "6.3 Inches". Only the Dawes limit of 0.89 arc sec matches a 130 mm aperture. Everything on this page comes from the Amazon listing, not from any testing we have done.
How those 2,118 ratings break down
An average hides its own shape. This is the spread behind the 4.3 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £499.00 |
|---|---|
| Rating | 4.3 out of 5 from 2,118 ratings |
| Objective lens diameter | 130 mm |
| Focal Length Description (as listed) | 325 millimetres — 130 mm ÷ 325 mm = f/2.5 |
| Optical-Tube Length | 635 mm — close to double the quoted focal length |
| Exit Pupil Diameter (as listed) | 26 mm — 130 mm ÷ 26 mm = 5x |
| Field Of View (as listed) | 6.3 Inches |
| Dawes Limit | 0.89 arc sec — consistent with a 130 mm aperture |
What it is up against
The rivals it was ranked against in Best Telescopes 2026: 10 Ranked, and the Specs That Don't Add Up.
Questions people ask
What does the Celestron NexStar 130SLT cost?
£499.00 as listed, with a 4.3-out-of-5 rating from 2,118 ratings.
How many objects can the NexStar 130SLT find?
The listing states a database of more than 40,000 stars, galaxies and nebulae, which the computerised mount locates and tracks.
Do the aperture and focal length on the Celestron NexStar 130SLT add up?
They do not. 130 mm of aperture with 325 mm of focal length is f/2.5, and the same listing gives an optical tube length of 635 mm, close to twice that focal length.
What magnification does the listed exit pupil suggest?
The exit pupil is given as 26 mm; against a 130 mm aperture that works out at 5x.
How does the mount work?
The listing describes a battery-powered altazimuth mount using Celestron's SkyAlign procedure, which aligns on any three bright objects centred in the eyepiece, and lists Computer as a compatible device.
What software comes with it?
The listing includes a free download of Starry Night Special Edition, described as an interactive sky simulation.
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