Telescope Comparison
Sky-Watcher Explorer 150PL vs Sky-Watcher Skyliner 150P
Same optics. Different mount philosophy.
First light
Sky-Watcher · 150mm · £249
The sky-learner's equatorial scope
- 150mm newtonian reflector on a manual equatorial mount
- Good for: Moon, planets, bright star clusters and nebulae
- Setup includes rough polar alignment before observing — more steps than a simple alt-az
- Mount axes feel counterintuitive at first; users find they become natural after several sessions
- Keeps the door open for adding tracking motors and moving into astrophotography later
Sky-Watcher · 150mm · £229
The maximum-aperture visual reflector
- 150mm Newtonian on a floor-standing Dobsonian alt-az rocker box
- Good for: full visual programme — planets, Moon, globular clusters, galaxies, nebulae
- No alignment required — set up and observe in under 10 minutes
- No motorised tracking — targets drift at high magnification as Earth rotates
- 13kg total — designed for a fixed garden or regular dark-sky site, not casual transport
The full picture
The numbers that separate these two scopes — and what they mean at the eyepiece.
Aperture
Equal light-gathering. Aperture won't settle this comparison — the mount, focal ratio, and observing experience are what differ.
Focal length
Same focal length — identical magnification with any given eyepiece. Differences come from optical design and coatings.
Focal ratio
Same focal ratio — the same eyepiece gives equivalent magnification and true field in both scopes.
Mount type
Sky-Watcher Skyliner 150P's Dobsonian is immediately intuitive — no alignment, push to aim, observe. Sky-Watcher Explorer 150PL's equatorial mount requires polar alignment before each session but tracks the sky as Earth rotates, keeping objects centred.
Weight (OTA)
Sky-Watcher Explorer 150PL's optical tube is 1.7kg lighter. Relevant if you plan to use it on multiple mounts or carry the tube to dark-sky sites separately.
Optical design
Sky-Watcher Explorer 150PL is a Newtonian reflector (mirrors, needs occasional collimation); Sky-Watcher Skyliner 150P is a DOBSONIAN. Different optical formulas produce different strengths — reflectors give more aperture per pound; refractors give sharper contrast and require no collimation.
At the eyepiece
| Target | Sky-Watcher Explorer 150PL | Sky-Watcher Skyliner 150P |
|---|---|---|
| Planets | ||
| Moon | Excellent 150mm aperture and f/8 focal ratio reward high-magnification lunar detail — craterlets, rilles, and shadow play along the terminator are superb. | Excellent 150mm aperture and f/8 focal ratio reward high magnification — craters, rilles, and shadow detail are crisp and high-contrast |
| Saturn | Excellent 150mm aperture and 1200mm focal length put Cassini Division and cloud banding within reach in steady seeing. | Excellent 150mm and 1200mm focal length put this squarely in the top tier — rings well-defined, Cassini Division visible in good seeing |
| Jupiter | Excellent Multiple cloud belts, the Great Red Spot, and Galilean moon shadows are visible at 150–200x. | Excellent Multiple cloud bands, GRS, and Galilean moon shadow transits visible at 150–200x |
| Mars | Good 150mm aperture shows the polar cap and dark surface markings near opposition — benefits from the long focal length for scale. | Good 150mm shows the disc clearly at opposition with polar cap and dark surface markings; needs very steady seeing |
Deep sky | ||
| Orion Nebula (M42) | Good Bright core and Trapezium are striking, but the 1200mm focal length crops the outer nebulosity compared to a wider-field scope. | Excellent 150mm gathers plenty of light for nebulosity and the Trapezium; the 1200mm focal length crops the outermost extent but core detail is superb |
| Andromeda Galaxy (M31) | Moderate Bright core is easy, but the galaxy's full extent far exceeds the narrow field — only the central region is visible. | Moderate 1200mm focal length shows only the bright core and inner halo — the full 3° extent of the galaxy is well beyond the field of view |
| Open clusters | Moderate Larger clusters like the Double Cluster overfill the field at 1200mm; smaller, compact clusters fare better. | Moderate Narrower field means large clusters like the Pleiades overfill the view; compact clusters like M35 and the Double Cluster fare better |
| Globular clusters | Good 150mm begins to resolve stars at the edges of M13 and M22 — a clear step up from smaller apertures. | Good 150mm begins resolving individual stars at the edges of M13 and M92 — a clear step up from smaller scopes |
| Faint galaxies | Good 150mm gathers enough light to detect many Messier and brighter NGC galaxies, though detail is limited. | Good 150mm pulls in galaxies like M81, M82, M51, and M104 as soft glows with hints of structure under dark skies |
| Milky Way / wide field | Not recommended 1200mm focal length gives far too narrow a field for sweeping Milky Way star fields. | Not recommended 1200mm focal length gives too narrow a field for sweeping star fields — a job better suited to binoculars or short-tube scopes |
Other | ||
| Double stars | Excellent 150mm aperture and f/8 focal ratio produce clean, high-contrast Airy discs — resolves pairs down to about 0.8 arcseconds. | Excellent 150mm aperture and long f/8 focal ratio produce clean Airy discs — splits close pairs like Albireo, Epsilon Lyrae, and Castor easily |
| Astrophotography (planetary) | Good 150mm aperture and 1200mm focal length suit webcam planetary imaging; the optional RA motor drive is strongly recommended to reduce drift. | Not applicable |
The real tradeoff
Both scopes are capable. The question is which one fits the way you actually observe.
Sky-Watcher Explorer 150PL
- You'll spend the first ten minutes on polar alignment and collimation checks, then settle into long sessions tracking planetary detail with the slow-motion controls — the equatorial mount is built for stationary, high-magnification work.
- Once aligned, you can nudge Saturn into the centre and hold it there while you swap between 100x and 200x magnification, keeping your eye on the Cassini Division without hunting across the field.
- Your observing session requires a dedicated setup space; the 1.2-metre tube doesn't fit in a car easily, and balancing it on the EQ3-2 means you're fussing with counterweights before you look at the sky.
Sky-Watcher Skyliner 150P
- You'll carry this out of the shed, plonk the rocker box on the ground, and be looking at Jupiter within two minutes — no alignment, no counterweights, no fiddling with slow-motion cables.
- When Saturn drifts out of view at 150x, you'll simply nudge the tube by hand to re-centre it; this feels natural and quick, not like a chore, because the alt-az motion is intuitive and the rocker box is stable underfoot.
- Deep-sky observing means reaching for the eyepiece case mid-session to swap from planetary hunting to cluster-gazing; the Dobsonian doesn't care which task comes next, and you're never tethered to a mount alignment.
The dark side
Every scope has a personality. Here’s where each one gets difficult.
Sky-Watcher
Sky-Watcher Explorer 150PL
The EQ3-2 mount flexes under the weight and length of the 150PL tube, causing noticeable vibration and wind-induced shake at magnifications above 150x.
Without a motor drive, objects slip out of the field at high power every 30–60 seconds, forcing constant manual correction via slow-motion controls or you abandon magnification.
The 1.2-metre tube is awkward to store upright, transport in most vehicles, and balance properly on the mount without careful counterweight adjustment.
The supplied 6x30 finder is small and dim, making initial target acquisition slow; most users report upgrading to a red-dot finder within weeks.
Sky-Watcher
Sky-Watcher Skyliner 150P
No tracking or GoTo means objects drift out of view at high magnification and require manual re-centering every 30–60 seconds.
The tube is approximately 1.2 metres long, creating storage and transport challenges compared to tabletop or collapsible designs.
Collimation is required periodically and after each transport — a normal Newtonian task, but a learning curve for beginners unfamiliar with mirror alignment.
The included 25mm and 10mm Plössl eyepieces are basic and noticeably outperformed by aftermarket alternatives, adding to the cost of a complete setup.
Which is right for you?
Two different buyers. Two different right answers.
The sky-learner's equatorial scope
Sky-Watcher · Sky-Watcher Explorer 150PL
You'll love this if you're a systematic observer who wants to learn equatorial mount mechanics while splitting tight double stars and tracking lunar detail for 30 minutes at a time. You're patient with setup, you have a dedicated observing space, and you want high native magnification without buying expensive eyepieces. This isn't for you if you grab the scope on a whim, load it in the car, and expect to be observing ten minutes later — or if you're chasing wide-field views of the Milky Way.
The maximum-aperture visual reflector
Sky-Watcher · Sky-Watcher Skyliner 150P
You'll love this if you want to walk out the door with a serious 150mm scope, set it down, and start exploring without learning polar coordinates or balancing counterweights. You're equally happy with planetary detail or hunting globular clusters, and you like the freedom to switch eyepieces and targets without re-aligning anything. This isn't for you if you want precision tracking for long-exposure astrophotography, or if you need the widest possible field of view for large nebulae.
Our verdict
These two are closer than most comparisons on this site. The spec differences are genuine — mount type, focal ratio — but neither is the wrong answer for a typical observer starting out.
If I had to choose between them: the Sky-Watcher Skyliner 150P is the scope most people will be using regularly six months from now. The Sky-Watcher Explorer 150PL rewards you more once you know what you're doing — it's worth revisiting after your first year.
Sky-Watcher Explorer 150PL
View Sky-Watcher Explorer 150PL →Sky-Watcher Skyliner 150P
View Sky-Watcher Skyliner 150P →Deep field: Full specifications
Every data point, for those who want to go further.
Full specifications
Fields highlighted in blue or amber indicate the better value for that spec. Data is manufacturer-stated and may vary.
How much can it see?
| Spec | Sky-Watcher Explorer 150PL | Sky-Watcher Skyliner 150P |
|---|---|---|
Aperture The most important spec — bigger = more light = better views | 150mm | 150mm |
Focal Length Longer = more magnification potential | 1200mm | 1200mm |
Focal Ratio Lower f-number = wider field of view; higher = more magnification per eyepiece | f/8 | f/8 |
Optical Design The type of optics — each design has different strengths | Newtonian Reflector | Dobsonian |
Coatings Better coatings = more light transmission through the optics | Parabolic primary mirror with multi-coated optics | Parabolic primary mirror, fully multi-coated |
How do you point it?
| Spec | Sky-Watcher Explorer 150PL | Sky-Watcher Skyliner 150P |
|---|---|---|
Mount Type The mechanical system that holds and moves the telescope | Equatorial | Dobsonian |
GoTo Computer-controlled pointing — finds any of thousands of objects automatically | ||
Tracking Motor keeps objects centred as the Earth rotates — essential for astrophotography |
The focuser
| Spec | Sky-Watcher Explorer 150PL | Sky-Watcher Skyliner 150P |
|---|---|---|
Focuser Size 2" accepts wider eyepieces and gives better low-power views | 1.25" | 1.25" |
Focuser Type Rack-and-pinion is standard; Crayford and dual-speed are smoother | Rack and pinion | Rack and pinion |
Size & weight
| Spec | Sky-Watcher Explorer 150PL | Sky-Watcher Skyliner 150P |
|---|---|---|
OTA Weightⓘ Optical tube only — useful for comparing mount load capacity | 5.1kg | 6.8kg |
Total Weightⓘ Full setup including mount — this is what you lug to the car | 14kg | 13kg |
Tube Length | 900mm | 1150mm |
Tube Material | Steel | Steel |
What's in the box?
| Spec | Sky-Watcher Explorer 150PL | Sky-Watcher Skyliner 150P |
|---|---|---|
Eyepieces Included eyepieces — more is better, but quality matters more than quantity | 25mm and 10mm Kellner | 25mm and 10mm Super eyepieces |
Finder Scope Helps you locate areas of the sky before switching to the main eyepiece | 6x30 optical finder scope | 6x30 optical finder |
Diagonal Tilts the eyepiece 90° for comfortable viewing — useful on refractors |
Blue highlight: Sky-Watcher Explorer 150PL advantage · Amber highlight: Sky-Watcher Skyliner 150P advantage · Greyed cells: equal or subjective.