# Best Telescopes 2026: 10 Ranked, and the Specs That Don't Add Up Source: https://www.ranked10.co.uk/tech/best-telescopes Published: 2026-09-16 | Updated: 2026-09-16 | Prices checked on Amazon UK on 2026-09-16 Three of the best telescopes here publish an aperture and a focal length that do not agree. The computerised 130mm reflector lists a 325mm focal length, which is f/2.5. The 130mm equatorial lists 260mm, which is f/2. The 102mm Maksutov lists 204mm, also f/2. Meanwhile the two listings whose figures do agree give f/11.8 (127mm over 1500mm) and f/5 (150mm over 750mm). The exit pupil column is stranger still: it runs from 0.1mm on one 70mm refractor to 35mm on another. In theory a 35mm exit pupil on a 70mm lens means 2x magnification, while the two eyepieces in that box, 20mm and 10mm over 700mm of focal length, give 35x and 70x. We ranked ten of the best telescopes on Amazon on four things you can check yourself: whether the aperture and focal length agree, whether the exit pupil is usable on the lens described, whether the magnification figures match the eyepieces supplied, and what the same optics cost elsewhere in the list. Where a spec table contradicts itself, we say so rather than pick a side. ## The ranking ### 1. Celestron NexStar 130SLT Computerised Reflector - Price: £499.00 | Amazon rating: 4.3 from 2,118 ratings - Full review: https://www.ranked10.co.uk/tech/best-telescopes/celestron-nexstar-130slt - Buy on Amazon: https://www.amazon.co.uk/dp/B0007UQNNQ?tag=ranked10-21 Our top pick among the best telescopes here: 130mm is the largest aperture in the SLT family, the GoTo mount holds 40,000+ objects, and 2,118 ratings average 4.3. It takes first place on aperture and on evidence. The 130mm objective is the largest in Celestron's SLT range, the mount carries a database of more than 40,000 objects, and 2,118 ratings average 4.3 — the second-highest review count among the best telescopes here. However, the spec table lists a 325mm focal length beside that 130mm aperture. Divide one by the other and you get f/2.5, a ratio no mass-market Newtonian is built at. In practice the appeal is the setup. This is a computerised telescope that aligns once you centre three bright objects in the eyepiece, then tracks whatever you pick. StarBright XLT coatings, a StarPointer red-dot finderscope, an altazimuth mount, 5.17 kg all-in, and a 635mm optical tube. Starry Night software comes as a download rather than a disc. That said, check the maths before you buy. The exit pupil is given as 26mm, which means 5x on a 130mm lens — nothing in the box will do that — while the zoom ratio on the same page says 20. If you want a wide field or long-exposure imaging, this is not the mount for it: an altazimuth head tracks objects but does not rotate with the sky. Pros: 130mm aperture, the largest in the SLT range, per the listing; 2,118 ratings averaging 4.3 — the second-highest review count on this list; GoTo mount with more than 40,000 objects and automatic tracking; SkyAlign: centre three bright objects and the mount aligns itself; 5.17 kg complete with the 635mm tube Cons: Focal length given as 325mm against a 130mm aperture, i.e. f/2.5; Exit pupil listed as 26mm, which implies 5x on a 130mm lens; Battery powered only; no mains supply listed; Manual focus, despite the computerised mount ### 2. Sky-Watcher Heritage 150 Tabletop Dobsonian - Price: £315.00 | Amazon rating: 4.4 from 104 ratings - Full review: https://www.ranked10.co.uk/tech/best-telescopes/sky-watcher-heritage-150 - Buy on Amazon: https://www.amazon.co.uk/dp/B09DGT69G1?tag=ranked10-21 The pick for most buyers: 150mm over 750mm gives a genuine f/5, and the three figures on the page actually agree with each other. This is a Dobsonian telescope whose numbers survive a calculator. The listing says 150mm aperture, 750mm focal length and f/5, and the three agree. Crucially, it is the largest aperture here for £315, and the only tabletop design on the list. The tube collapses for transport while, according to Sky-Watcher, holding collimation. The primary mirror is borosilicate and parabolic, with a Radiant Aluminum Quartz coating. There is a 1.25-inch helical focuser, a reflex finderscope and rubber feet to damp vibration. Total weight is 10.4 kg, which makes this a table-and-garden instrument rather than a backpack one. The catch is the mount. A tabletop Dobsonian needs a flat, solid surface at a sensible height, and there is no motor and no GoTo — you find the objects yourself. Worth noting, too, that the exit pupil column says 0.2mm; on a 150mm aperture that would be 750x, which an f/5 focal length cannot deliver. If you want an app to point the scope for you, look further down this list. Pros: 150mm aperture matched to a 750mm focal length — genuine f/5; Borosilicate parabolic primary with RAQ coating, per the listing; Collapsible tube retains collimation, says Sky-Watcher; The cheapest route here to 150mm of aperture, at £315; Rubber feet and a helical focuser at this price Cons: Manual only: no GoTo, no tracking motor; 10.4 kg, and it needs a table or wall to sit on; Exit pupil listed as 0.2mm, which contradicts f/5; Only 104 ratings, against 2,118 on the model above ### 3. Celestron NexStar 127SLT Maksutov-Cassegrain - Price: £599.00 | Amazon rating: 4.3 from 1,149 ratings - Full review: https://www.ranked10.co.uk/tech/best-telescopes/celestron-nexstar-127slt - Buy on Amazon: https://www.amazon.co.uk/dp/B0038LX8XE?tag=ranked10-21 One of only two listings here whose aperture and focal length match: 127mm over 1500mm is f/11.8. This Maksutov Cassegrain telescope is one of only two listings among the best telescopes here whose aperture and focal length agree: 127mm over 1500mm, or f/11.8. It is a long, slow tube, which suits the Moon and the planets. The Dawes limit is quoted at 0.91 arc seconds, consistent with that aperture, and the exit pupil at 3.53mm. The mount does the work: more than 40,000 objects, SkyAlign on three bright stars, automatic tracking. The optical tube measures 381mm and the complete setup weighs 8.21 kg. By contrast with the 130mm reflector above, this one trades field of view for focal length — 1.7 degrees is what the page lists. Even so, at £599 it is the joint most expensive item here, and its 1,149 ratings average the same 4.3 as the £499 reflector. A Maksutov also needs time to settle to outside temperature, and f/11.8 gives you a narrow window on anything wide. If faint galaxies matter more to you than planets, a bigger aperture costs less than this. Pros: 127mm and 1500mm agree, giving f/11.8; Dawes limit of 0.91 arc seconds fits a 127mm aperture; GoTo mount with 40,000+ objects and tracking; 8.21 kg and a 381mm tube — compact for the focal length; 1,149 ratings at 4.3 Cons: £599, the joint-highest price on this list; 1.7-degree field of view: narrow for deep-sky objects; Battery powered; no mains option listed; Same 4.3 rating as the £499 model, for £100 more ### 4. DWARFLAB Dwarf 3 Smart Telescope - Price: £499.00 | Amazon rating: 4.5 from 428 ratings - Full review: https://www.ranked10.co.uk/tech/best-telescopes/dwarflab-dwarf-3-smart-telescope - Buy on Amazon: https://www.amazon.co.uk/dp/B0FB2ZQS79?tag=ranked10-21 The highest-rated item here at 4.5 from 428 ratings, and the only one that is a camera rather than an eyepiece telescope. Of everything on this list, this is the smart telescope for astrophotography: a 1.35 kg unit with two lenses, app control and automatic tracking. It also carries the best score here, 4.5 from 428 ratings. However, a single cell in the spec table gives the focal length three times over — '35 mm f/4.28', '150 mm focal length' and '737 mm equivalent focal length' — and those describe different things. In use it works from a phone. The telephoto lens handles deep-sky targets and daylight subjects; the wide-angle lens covers the Milky Way and star trails. Processing happens in the DWARFLAB app, so no computer is needed. It measures 22.2cm wide and weighs 1.35 kg including the battery, and the page lists a 10-year spare part availability window. That said, there is no eyepiece, so you look at a screen rather than through glass, and a 35mm objective will not show you Jupiter the way a 127mm Maksutov will. The box includes the scope, a carry bag, magnetic solar filters and a USB-C cable. If you want to observe with your own eye, skip it. Pros: 4.5 from 428 ratings — the highest score on this list; 1.35 kg and 22.2cm wide, so it fits a daypack; Dual lenses: 35mm and 150mm, per the listing; Automatic tracking and in-app processing, no PC required; Box includes carry bag, magnetic solar filters and USB-C cable Cons: Three different focal length figures in the same spec cell; 35mm objective against a 127mm Maksutov elsewhere on this list; No eyepiece: screen-only viewing; £499 for a fixed-lens device that cannot be upgraded ### 5. Celestron AstroMaster 130EQ Motor Drive - Price: £299.99 | Amazon rating: 4.2 from 1,956 ratings - Full review: https://www.ranked10.co.uk/tech/best-telescopes/celestron-astromaster-130eq - Buy on Amazon: https://www.amazon.co.uk/dp/B0013Z42AK?tag=ranked10-21 The cheapest 130mm here at £299.99, and the best telescope under 500 if you want a motor drive on an equatorial head. Here is where the arithmetic gets awkward. The listing gives 130mm aperture and a 260mm focal length, and 260 divided by 130 is f/2. At the same time, the same page quotes an optical zoom of 130.0, which is the aperture figure reused as a magnification. Either way, £299.99 buys the cheapest 130mm instrument here. In practice the mount is the point: a CG-3 equatorial head with setting circles and a motor drive that tracks objects as they drift. That is the right design if you ever want to try imaging. The steel tripod is adjustable and full height and weighs 3.4 kg on its own, while the complete scope is 7.71 kg. Starry Night Basic software is a download, with a 36,000-object database. That said, this carries the lowest rating here at 4.2 from 1,956 ratings, and the 20mm and 10mm eyepieces supplied would give roughly 13x and 26x on a 260mm focal length — far too little to be useful. An equatorial mount also takes longer to set up than a tabletop Dobsonian. If you want a first scope for the Moon and planets, the £315 f/5 above is the easier buy. Pros: Cheapest 130mm on this list at £299.99; CG-3 equatorial mount with setting circles and a motor drive; 1,956 ratings, so a large sample to read through; Full-height adjustable steel tripod; 7.71 kg complete; Equatorial tracking suits anyone thinking about imaging Cons: 260mm focal length against a 130mm aperture, i.e. f/2; Zoom ratio of 130.0 on the page just repeats the aperture; Lowest rating here: 4.2 from 1,956 ratings; Supplied eyepieces would give roughly 13x and 26x ### 6. Celestron NexStar 4SE Computerised Maksutov-Cassegrain - Price: £599.99 | Amazon rating: 4.4 from 740 ratings - Full review: https://www.ranked10.co.uk/tech/best-telescopes/celestron-nexstar-4se - Buy on Amazon: https://www.amazon.co.uk/dp/B000GUFOBO?tag=ranked10-21 A 102mm Maksutov with a 0.11-degree field of view — the narrowest here — and a focal length that does not match its aperture. The 4SE has the smallest aperture of any of the best telescopes on this page, and the only orange tube. It is fully automated, with a GoTo database of more than 40,000 objects, and 740 ratings average 4.4. However, the page lists a 102mm mirror with a 204mm focal length — again f/2, the same ratio as the two reflectors above. Used as intended, it is a compact Mak: 10.4 kg in total, a 343mm tube, XLT coatings and a motorised altazimuth mount that finds and tracks. The field of view is quoted at 0.11 degrees, the narrowest on this list, which makes it a Moon-and-planet instrument above all. That said, £599.99 is the highest price here, and there is no equatorial mode for long exposures. The exit pupil is listed as 0.5mm, which on a 102mm lens means 204x; no eyepiece is named on the page, so that figure cannot be checked. If you want wide views or a cheap first setup, this is not it. Pros: Fully automated GoTo mount with 40,000+ objects; 4.4 from 740 ratings; Compact 343mm tube and 10.4 kg all-in; XLT coatings listed; 102mm Maksutov-Cassegrain design in the orange tube Cons: £599.99 — the highest price on this list; 204mm focal length against a 102mm aperture, i.e. f/2; 0.11-degree field of view, the narrowest here; Exit pupil of 0.5mm implies 204x, with no eyepiece named ### 7. SOLOMARK 80mm Refractor, 900mm Focal Length - Price: £139.99 | Amazon rating: 4.4 from 227 ratings - Full review: https://www.ranked10.co.uk/tech/best-telescopes/solomark-80mm-900mm-refractor - Buy on Amazon: https://www.amazon.co.uk/dp/B0CHR81WJ1?tag=ranked10-21 The longest focal length here relative to aperture, 80mm over 900mm, if you can live with a manual altazimuth head. If you are hunting the best telescope for beginners under £150, this 80mm refractor is the obvious candidate: 227 ratings at 4.4 and a 900mm focal length, the longest here relative to its aperture. The listing also quotes a zoom ratio of 10x, yet the bullets say the 10mm and 20mm eyepieces deliver 90x and 45x. Both figures cannot be right. In practice the tripod matters more than the optics at this price. SOLOMARK fits a super azimuth gimbal with altitude and azimuth scales to an aluminium full-height tripod, and adds a 5x24 finderscope, an erect-image diagonal and a phone adapter. Everything packs into the supplied bag, and the kit weighs 4.49 kg. That said, the focus type is listed as fixed focus, which sits oddly with an eyepiece-based refractor, and the exit pupil of 0.89mm implies roughly 90x — plausible with the 10mm eyepiece, not with the 20mm. The mount is manual, so you point it yourself. If you want tracking or GoTo, step up to the computerised models above. Pros: 80mm aperture over a 900mm focal length — the longest ratio here; 227 ratings averaging 4.4 at £139.99; Gimbal head with altitude and azimuth scales on a full-height tripod; 5x24 finderscope, erect-image diagonal and phone adapter included; 4.49 kg including the carry bag Cons: Zoom ratio of 10x contradicts the 90x and 45x in the bullets; Focus type listed as fixed focus; Manual mount: no tracking and no GoTo; Exit pupil of 0.89mm fits the 10mm eyepiece but not the 20mm ### 8. EACONN 80mm Refractor, 600mm Focal Length - Price: £69.99 | Amazon rating: 4.4 from 642 ratings - Full review: https://www.ranked10.co.uk/tech/best-telescopes/eaconn-80mm-refractor-600mm - Buy on Amazon: https://www.amazon.co.uk/dp/B08T7844LT?tag=ranked10-21 The cheapest telescope here at £69.99 — and the same 80mm refractor with the same eyepieces also appears at £99.99. If you want the best refractor telescope here for the least money, this is it. It is a telescope for adults astronomy at a starter price: 80mm aperture, 600mm focal length, K20 and K9 eyepieces giving 30x to 66x, and 642 ratings at 4.4. The catch is the paperwork. The same 80mm/600mm refractor, with the same two eyepieces, is listed at £69.99 and at £99.99, and the two spec tables give the kit's weight as 840 g on one page and 3.15 kg on the other. In use it does the simple things: an altazimuth mount with a scaled positioning gimbal, a 5x24 crosshair finder, a phone adapter and a backpack. It suits the Moon, bright planets and daytime landscape viewing. As a result it is a reasonable first instrument for a child of 8 to 12. However, the zoom ratio field says 64 while the eyepieces work out at 30x to 66x, and a 2.3 kg gap between two weights for the same set is not a rounding error. The mount is manual and the focuser is basic. If you want to see structure in galaxies or hold a planet steady at high power, this will frustrate you. Pros: £69.99 — the lowest price on this list; 642 ratings at 4.4; Two eyepieces, K20 and K9, give 30x to 66x per the listing; Phone adapter, 5x24 finder and backpack included; 80mm over 600mm is a workable f/7.5 Cons: The same telescope is listed at £69.99 and at £99.99; Weight given as 840 g on one page and 3.15 kg on the other; Zoom ratio of 64 disagrees with the 30x-66x in the bullets; Manual mount, no tracking ### 9. Celestron Travel Scope 70 Refractor with Backpack - Price: £89.95 | Amazon rating: 4.3 from 14,391 ratings - Full review: https://www.ranked10.co.uk/tech/best-telescopes/celestron-travel-scope-70 - Buy on Amazon: https://www.amazon.co.uk/dp/B001TI9Y2M?tag=ranked10-21 The most-reviewed telescope on this list by a distance, at 14,391 ratings, and the one with the strangest exit pupil figure. With 14,391 ratings at 4.3, this is the most-reviewed item here by an order of magnitude. The 70mm aperture and 700mm focal length give f/10, and the two supplied eyepieces, 20mm and 10mm, deliver 35x and 70x. As a cheap first look at the Moon with a backpack, that is a long-proven combination. The kit travels: a full-height tripod, a panning handle with clutch for smooth pointing, a StarPointer red-dot finder, a diagonal and a custom backpack, with the optical tube at 1.91 kg. The glass is fully coated and the listing offers a two-year warranty. Worth noting the exit pupil column, which says 35mm. On a 70mm lens a 35mm exit pupil would mean 2x magnification, while the eyepieces in the box give 35x and 70x — roughly seventeen times apart. The eyepiece description also says 'Barlow', although no Barlow appears in the box list. If you want a wide field or a driven mount, keep looking. Pros: 14,391 ratings at 4.3 — the largest sample here; 70mm over 700mm gives a manageable f/10; The 20mm and 10mm eyepieces give 35x and 70x; Backpack, full-height tripod and panning handle included; 1.91 kg optical tube with a two-year warranty Cons: Exit pupil listed as 35mm, which would be 2x on a 70mm lens; Eyepiece description says Barlow; the box list has none; 70mm aperture is the joint-smallest here; No motor and no GoTo: manual altazimuth only ### 10. Celestron StarSense Explorer LT 70AZ Refractor - Price: £179.99 | Amazon rating: 4.3 from 185 ratings - Full review: https://www.ranked10.co.uk/tech/best-telescopes/celestron-starsense-explorer-lt-70az - Buy on Amazon: https://www.amazon.co.uk/dp/B088PPBC5Z?tag=ranked10-21 A 70mm refractor that uses your phone to find objects, with the smallest exit pupil figure in the whole article. The LT 70AZ shares its 70mm aperture and 700mm focal length with the Travel Scope above, and adds StarSense: a phone dock and an app that read the sky and point you to a target. Among the best telescopes for anyone who wants an app in the loop, this is the cheapest route. It also has the fewest ratings here, 185 at 4.3. The app builds a list of what is visible from where you stand, including from a city, and the mount is manual altazimuth with a slow-motion rod, so you follow the on-screen arrows until the bullseye turns green. The box includes 25mm and 10mm eyepieces, a 2x Barlow, an erect-image diagonal, a red-dot finder and a full-height tripod, at 3.35 kg. Even so, the spec table has problems. The exit pupil is given as 0.1mm, which on a 70mm aperture implies 700x — nothing a 70mm refractor can deliver at any sensible magnification. The model name in the same table reads 'Astromaster LT70', while the listing title says StarSense Explorer LT 70AZ. And the optical tube is listed at 812mm against a 700mm focal length. If you want the fewest unverifiable claims, this is not the one. Pros: StarSense phone dock and app for point-and-follow finding; 25mm and 10mm eyepieces plus a 2x Barlow in the box; Manual altazimuth mount with slow-motion control; 3.35 kg with a full-height tripod; The app lists what is visible from a city, per the listing Cons: Exit pupil listed as 0.1mm, which implies 700x; The spec table names the model 'Astromaster LT70', not StarSense; 812mm optical tube listed against a 700mm focal length; Only 185 ratings, the smallest sample here ## Verdict Not every one of the best telescopes here needs a clean spec sheet to be useful, but two come close. For most homes, the 150mm tabletop Dobsonian at £315 is the pick: it is the only large-aperture model here whose f/5 ratio agrees with its own numbers, and it needs no batteries. If you want the mount to find objects for you, the 127mm Maksutov at £599 is one of just two listings where aperture and focal length match, and it tracks what you point at. For a first look at the Moon on a small budget, the 80mm refractor at £69.99 does the job — though note that among the best telescopes here it also appears at £99.99, with the weight quoted as 840 g on one page and 3.15 kg on the other. Either way, the two that add up are the two worth starting with.