Telescope Comparison
Orion SpaceProbe 130ST EQ Reflector vs Sky-Watcher Quattro 150P
The Orion SpaceProbe 130ST EQ Reflector is a complete setup. The Sky-Watcher Quattro 150P needs a mount before it's usable.
First light
Orion · 130mm
The sky-learner's equatorial scope
- 130mm 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 · £399
The custom-rig optical tube
- 150mm newtonian reflector — optical tube only, no mount included
- 750mm focal length at f/5
- Requires a compatible mount before you can observe anything
- Best for: observers who already own a suitable mount or are building a specific imaging rig
- Not a complete purchase — budget at least £100–300 extra for a mount before observing
The full picture
The numbers that separate these two scopes — and what they mean at the eyepiece.
Aperture
Sky-Watcher Quattro 150P gathers 1.3× more light. On bright targets — Moon, Saturn, Jupiter — you won't notice. On fainter targets — dim galaxies, faint globular clusters — the gap is real.
Focal length
Sky-Watcher Quattro 150P's longer focal length reaches higher magnification with the same eyepiece — better reach for planetary detail. Orion SpaceProbe 130ST EQ Reflector's shorter focal length gives a wider true field — better for large open clusters and extended nebulae.
Focal ratio
Same focal ratio — the same eyepiece gives equivalent magnification and true field in both scopes.
Mount type
Sky-Watcher Quattro 150P has no mount — add a compatible mount before you can observe. Orion SpaceProbe 130ST EQ Reflector is a complete ready-to-use system.
Weight (OTA)
Similar optical tube weight. Any portability difference between these setups comes from the mount, not the tube itself.
Optical design
Both are Newtonian reflectors — the same optical formula. Any performance difference comes from collimation quality, focal ratio, and eyepiece choice, not the design itself.
At the eyepiece
Orion
Orion SpaceProbe 130ST EQ Reflector
The Moon fills the field at low power with more detail than you'll have time to explore on any given night. Saturn's rings are unmistakable from the first session; in good seeing, the Cassini Division — the dark gap between the A and B rings — is a genuine target at higher magnification. Jupiter shows two equatorial cloud bands clearly, the four Galilean moons changing position night to night. The Orion Nebula (M42) shows clear structure — nebulosity spreading around the Trapezium, which splits at moderate power. The Andromeda Galaxy (M31) shows a concentrated core clearly. The Hercules Cluster (M13) shows some resolution at the edges at higher magnification.
Sky-Watcher
Sky-Watcher Quattro 150P
The Moon fills the field at low power with more detail than you'll have time to explore on any given night. Saturn's rings are unmistakable from the first session; in good seeing, the Cassini Division — the dark gap between the A and B rings — is a genuine target at higher magnification. Jupiter shows two equatorial cloud bands clearly, the four Galilean moons changing position night to night. The Orion Nebula (M42) shows clear structure — nebulosity spreading around the Trapezium, which splits at moderate power. The Andromeda Galaxy (M31) shows a concentrated core clearly. The Hercules Cluster (M13) shows some resolution at the edges at higher magnification.
The real tradeoff
Both scopes are capable. The question is which one fits the way you actually observe.
The Orion SpaceProbe 130ST EQ Reflector is a complete package — everything arrives in one box and you can observe the same day. The Sky-Watcher Quattro 150P is a bare optical tube that needs a separate compatible mount before you can point it at anything, adding significant cost and complexity. Unless you already own a suitable mount, the Orion SpaceProbe 130ST EQ Reflector is the practical choice.
The dark side
Every scope has a personality. Here’s where each one gets difficult.
Orion
Orion SpaceProbe 130ST EQ Reflector
Mount axes feel counterintuitive at first
An equatorial mount does not move up/down and left/right as you expect — it follows the rotation of the sky. Users consistently report that it takes several sessions before it begins to feel natural.
Collimation: the skill nobody mentions in the listing
The mirrors go out of alignment with use. Stars look bloated rather than sharp when this happens. Users report that a Cheshire eyepiece makes collimation straightforward once learned, but most beginners don't discover they need it until their second or third month.
Sky-Watcher
Sky-Watcher Quattro 150P
No mount included
You cannot observe until you buy a separate compatible mount — add at least £100–300 before you have a working telescope.
Nothing to look through on day one
Until a mount arrives, the optical tube is a piece of glass you cannot point at the sky.
Which is right for you?
Two different buyers. Two different right answers.
The sky-learner's equatorial scope
Orion · Orion SpaceProbe 130ST EQ Reflector
You’ll love this if…
- You want to understand how an equatorial mount works — and you're prepared to spend a few sessions on polar alignment before it becomes second nature
- You plan to observe from a fixed spot in the garden, where the mount can stay roughly polar-aligned between sessions
- Astrophotography is on your radar even if you're not starting there — this mount keeps that option open with a motor drive upgrade
This will frustrate you if…
- You find the equatorial mount's axes feel wrong — objects move in unexpected directions and polar alignment adds a step each session that takes several outings to become automatic
- You notice that stars look bloated rather than sharp and don't know why — users report this is usually a collimation issue that's straightforward to fix once you know about it, but the listing doesn't mention it
The custom-rig optical tube
Sky-Watcher · Sky-Watcher Quattro 150P
You’ll love this if…
- You already own a compatible equatorial or alt-az mount — this is the optical tube you've specifically chosen to put on it
- You're building an imaging rig piece by piece and know exactly what you need at the end of a focuser
- Choosing an optical tube independently of the mount gives you more flexibility over your overall system
This will frustrate you if…
- You buy it without fully accounting for the mount — add at least £100–300 to the purchase price before you have a working telescope
- You expected a complete package and didn't realise this is a bare optical tube that cannot be used without a separate mount
Our verdict
This comparison has a catch: the Sky-Watcher Quattro 150P is a bare optical tube. You cannot use it without a separate mount — which adds meaningful cost and complexity. The Orion SpaceProbe 130ST EQ Reflector is a complete, ready-to-observe package.
For most buyers, the Orion SpaceProbe 130ST EQ Reflector is the right choice — you can observe the same night it arrives. The Sky-Watcher Quattro 150P makes sense if you already own a compatible mount, or are deliberately building a specific imaging setup piece by piece. If I had to choose for a first telescope: the Orion SpaceProbe 130ST EQ Reflector, without hesitation.
Orion SpaceProbe 130ST EQ Reflector
View Orion SpaceProbe 130ST EQ Reflector →Sky-Watcher Quattro 150P
View Sky-Watcher Quattro 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 | Orion SpaceProbe 130ST EQ Reflector | Sky-Watcher Quattro 150P |
|---|---|---|
Apertureⓘ The most important spec — bigger = more light = better views | 130mm | 150mm |
Focal Length Longer = more magnification potential | 650mm | 750mm |
Focal Ratio Lower f-number = wider field of view; higher = more magnification per eyepiece | f/5 | f/5 |
Optical Design The type of optics — each design has different strengths | Newtonian Reflector | Newtonian Reflector |
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 | Orion SpaceProbe 130ST EQ Reflector | Sky-Watcher Quattro 150P |
|---|---|---|
Mount Type The mechanical system that holds and moves the telescope | Equatorial | None (OTA only) |
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 | Orion SpaceProbe 130ST EQ Reflector | Sky-Watcher Quattro 150P |
|---|---|---|
Focuser Size 2" accepts wider eyepieces and gives better low-power views | 1.25" | 2" |
Focuser Type Rack-and-pinion is standard; Crayford and dual-speed are smoother | Rack and pinion | Dual-speed Crayford (10:1 reduction) |
Size & weight
| Spec | Orion SpaceProbe 130ST EQ Reflector | Sky-Watcher Quattro 150P |
|---|---|---|
OTA Weightⓘ Optical tube only — useful for comparing mount load capacity | 4.5kg | 4.6kg |
Total Weight Full setup including mount — this is what you lug to the car | 9kg | — |
Tube Length | 630mm | — |
Tube Material | Steel | Steel |
What's in the box?
| Spec | Orion SpaceProbe 130ST EQ Reflector | Sky-Watcher Quattro 150P |
|---|---|---|
Eyepieces Included eyepieces — more is better, but quality matters more than quantity | 25mm and 10mm Sirius Plössl | — |
Finder Scope Helps you locate areas of the sky before switching to the main eyepiece | EZ Finder II red dot | — |
Diagonal Tilts the eyepiece 90° for comfortable viewing — useful on refractors |
Blue highlight: Orion SpaceProbe 130ST EQ Reflector advantage · Amber highlight: Sky-Watcher Quattro 150P advantage · Greyed cells: equal or subjective.