Telescope Comparison
Sky-Watcher Quattro 150P vs Sky-Watcher Quattro 200P
The specs are close. The experience isn't.
First light
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
Sky-Watcher · 200mm · £599
The custom-rig optical tube
- 200mm newtonian reflector — optical tube only, no mount included
- 800mm focal length at f/4
- 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 200P gathers 1.8× 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 200P's longer focal length reaches higher magnification with the same eyepiece — better reach for planetary detail. Sky-Watcher Quattro 150P's shorter focal length gives a wider true field — better for large open clusters and extended nebulae.
Focal ratio
Sky-Watcher Quattro 200P's faster f/4 delivers wider fields with any eyepiece — better for open clusters and large nebulae. Sky-Watcher Quattro 150P's f/5 provides more magnification per eyepiece — better for fine planetary detail.
Mount type
Neither scope includes a mount — both require a separate purchase before you can observe.
Weight (OTA)
Sky-Watcher Quattro 150P's optical tube is 2.9kg lighter. Relevant if you plan to use it on multiple mounts or carry the tube to dark-sky sites separately.
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
| Target | Sky-Watcher Quattro 150P | Sky-Watcher Quattro 200P |
|---|---|---|
| Planets | ||
| Moon | Excellent 150mm aperture delivers crisp lunar detail; the f/5 focal ratio is less forgiving at high magnification but still rewards visual observation | Excellent 200mm resolves fine crater detail, rilles, and mountain shadows — though f/4 limits useful magnification compared to slower designs before image quality softens |
| Saturn | Good 150mm resolves rings and Cassini Division; 750mm focal length falls short of the 1000mm+ ideal for high-magnification planetary detail | Good 200mm shows rings, Cassini Division, and cloud banding, but the 800mm focal length requires heavy Barlowing for ideal planetary scale |
| Jupiter | Good Cloud belts, GRS, and Galilean moons visible; faster focal ratio demands quality eyepieces for clean high-power views | Good Cloud belts, GRS, and Galilean moons visible, but the short focal length means you need a Barlow to reach useful magnification |
| Mars | Good 150mm aperture shows polar caps and major albedo features near opposition; limited focal length constrains useful magnification | Good 200mm aperture resolves polar cap and major surface albedo features at opposition, though 800mm focal length keeps the disc small |
Deep sky | ||
| Orion Nebula (M42) | Excellent 150mm aperture and wide f/5 field frame the full nebula with surrounding running man region — superb both visually and for imaging | Excellent 200mm at f/4 delivers bright, contrasty nebulosity with the Trapezium cleanly split; wide field captures the full extent including the Running Man |
| Andromeda Galaxy (M31) | Excellent 750mm focal length captures the full extent of M31 on an APS-C sensor; visually the core and dust lanes are evident | Excellent 800mm focal length frames the bright core and inner spiral arms well; 200mm aperture reveals dust lanes visually and captures the full halo in imaging |
| Open clusters | Excellent Wide field at 750mm frames large clusters like the Double Cluster and Pleiades beautifully | Excellent 800mm focal length and wide true field frame large clusters like the Double Cluster, Pleiades, and M35 beautifully |
| Globular clusters | Good 150mm begins to resolve outer stars in M13 and M22; core remains granular rather than fully resolved | Good 200mm partially resolves outer stars in M13 and M22; core remains granular but not fully resolved |
| Faint galaxies | Good 150mm gathers enough light for many NGC galaxies; imaging with stacked exposures reveals detail well beyond what's visible at the eyepiece | Good 200mm gathers enough light to detect galaxies in the Virgo Cluster and Leo Triplet; structure hints visible under dark skies |
| Milky Way / wide field | Good 750mm focal length gives rich star fields but is narrower than the sub-400mm ideal for true Milky Way sweeps | Moderate 800mm is wider than most 8-inch Newtonians but still too narrow for sweeping Milky Way panoramas; f/4 speed helps with rich star fields |
Other | ||
| Double stars | Good 150mm resolves sub-arcsecond pairs in theory, but the f/5 focal ratio is less forgiving than long focal ratio refractors for clean splitting | Good 200mm resolves down to sub-arcsecond pairs, but f/4 makes tight doubles trickier — diffraction effects are more pronounced than in slower scopes |
| Astrophotography (planetary) | Good 150mm provides decent planetary image scale; a 2× Barlow brings effective focal length to 1500mm which helps, but no mount is included | Moderate 200mm aperture is capable but 800mm focal length is short for planetary scale; needs a Barlow and a tracking mount not included |
| Astrophotography (deep sky) | Not recommended No mount or tracking included — the OTA is designed for deep-sky imaging but requires a separately purchased equatorial mount to function as an astrograph | Not recommended No mount or tracking included — the OTA is excellent for deep-sky imaging but only once paired with a capable equatorial mount like the EQ6-R Pro |
| Emission nebulae (wide-field imaging) | Excellent The f/5 speed and 750mm focal length are ideal for large emission targets like the Rosette, Veil, and North America Nebulae when paired with a suitable mount and narrowband filters | Not applicable |
| Emission nebulae (imaging) | Not applicable | Excellent The f/4 speed is ideal for narrowband imaging of large emission nebulae like the Veil, Rosette, and Heart — when mounted on an equatorial platform with guiding |
The real tradeoff
Both scopes are capable. The question is which one fits the way you actually observe.
Sky-Watcher Quattro 150P
- You'll spend less on the OTA itself (£399), but you're still looking at £800–1,200+ for a decent mount, making total entry cost deceptively high — the aperture advantage means you can start with a lighter EQ5 or a solid alt-azimuth tracking mount rather than the heavy-duty equatorial that the 200P demands.
- Your four-minute exposure times versus the 200P's one-minute subs mean you'll accumulate signal more slowly under light pollution, but you'll also suffer fewer tracking errors and less wind-induced vibration during each sub — a real win on mediocre nights.
- You'll collimate more often than with a slower Newtonian, but less frequently than the 200P — the f/5 speed is demanding without being unforgiving, and a laser collimator makes it a five-minute job rather than a frustration.
Sky-Watcher Quattro 200P
- You'll spend roughly £1,800+ by the time you have a mount, coma corrector, and basic guide camera — a significant commitment — but the extra 50mm of aperture means fainter nebulosity and fine galaxy structure appear in your stacked images that the 150P simply won't reach.
- Your one-minute exposures let you build signal four times faster per frame, which matters enormously if you're chasing faint extended objects under suburban skies; you'll also spend less total time at the eyepiece waiting for enough integration, leaving more time for setup and processing.
- You'll treat collimation as a pre-session ritual rather than an occasional task — the f/4 speed punishes poor collimation harshly, and every transport risk requires a laser check — but once dialled in, the optics reward you with wide-field performance no 150P can match.
The dark side
Every scope has a personality. Here’s where each one gets difficult.
Sky-Watcher
Sky-Watcher Quattro 150P
Ships as an OTA only with no mount, coma corrector, or eyepieces — your true entry cost is three to four times the listed price.
Significant coma at field edges without a dedicated coma corrector — mandatory for imaging, not optional.
Requires regular collimation with a laser collimator strongly recommended — more critical at f/5 than with slower designs.
Short 750mm focal length limits planetary image scale compared to dedicated planetary scopes or Barlowed setups.
Spider vane diffraction spikes appear on bright stars in images.
Sky-Watcher
Sky-Watcher Quattro 200P
No mount included — budget at least £1,200 extra for a capable equatorial mount like the EQ6-R Pro.
Coma corrector is essential at f/4; without it, edge-of-field stars are badly elongated for both imaging and visual use.
Collimation is critical and less forgiving than slower Newtonians — frequent checking required, especially after transport.
The 800mm focal length limits planetary magnification compared to longer-focal-length designs of the same aperture.
Total imaging rig cost (mount, camera, guiding, corrector) typically exceeds £2,500 on top of the OTA price.
Fast focal ratio makes the scope sensitive to tilt, spacing errors, and focuser flex — precise backfocus to the coma corrector is important.
Which is right for you?
Two different buyers. Two different right answers.
The custom-rig optical tube
Sky-Watcher · Sky-Watcher Quattro 150P
You're right for this scope if you've already committed to astrophotography and understand polar alignment and guiding — you want wide-field nebula frames on a realistic budget, and you're comfortable building out a complete rig incrementally. You'll love it if you're imaging large nebulae like the Veil or Heart and Soul with an APS-C sensor, where the f/5 speed and 150mm aperture hit a sweet spot between cost and capability. This isn't for you if you want a ready-to-use setup out of the box, prefer visual observing, or haven't yet mastered collimation and mount alignment.
The custom-rig optical tube
Sky-Watcher · Sky-Watcher Quattro 200P
You're right for this scope if you're an intermediate imager ready to build a dedicated £2,500+ rig and you want the deepest possible signal in faint extended targets — you'll love the f/4 speed and 200mm aperture working together to reveal galaxy structure and nebulae that smaller scopes miss, especially with narrowband filters under light-polluted skies. This isn't for you if you're a beginner, want casual visual observing, or can't commit to frequent collimation and precise backfocus management — the optics are demanding and unforgiving when neglected.
Our verdict
At £399 versus £599, the Sky-Watcher Quattro 200P costs 50% more. It delivers 50mm more aperture — a real and visible advantage on faint targets.
If budget is a genuine constraint, the Sky-Watcher Quattro 150P will make you a happy observer. The Sky-Watcher Quattro 200P's optical advantage on faint targets is real and you are unlikely to regret it if you can stretch. If I had to choose without knowing your situation: start with the Sky-Watcher Quattro 150P, use it for a year, then upgrade knowing exactly what you want.
Sky-Watcher Quattro 150P
View Sky-Watcher Quattro 150P →Sky-Watcher Quattro 200P
View Sky-Watcher Quattro 200P →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 Quattro 150P | Sky-Watcher Quattro 200P |
|---|---|---|
Apertureⓘ The most important spec — bigger = more light = better views | 150mm | 200mm |
Focal Length Longer = more magnification potential | 750mm | 800mm |
Focal Ratio Lower f-number = wider field of view; higher = more magnification per eyepiece | f/5 | f/4 |
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, fully multi-coated | Parabolic primary mirror, fully multi-coated |
How do you point it?
| Spec | Sky-Watcher Quattro 150P | Sky-Watcher Quattro 200P |
|---|---|---|
Mount Type The mechanical system that holds and moves the telescope | None (OTA only) | 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 | Sky-Watcher Quattro 150P | Sky-Watcher Quattro 200P |
|---|---|---|
Focuser Size 2" accepts wider eyepieces and gives better low-power views | 2" | 2" |
Focuser Type Rack-and-pinion is standard; Crayford and dual-speed are smoother | Dual-speed Crayford (10:1 reduction) | Dual-speed Crayford (10:1 reduction) |
Size & weight
| Spec | Sky-Watcher Quattro 150P | Sky-Watcher Quattro 200P |
|---|---|---|
OTA Weightⓘ Optical tube only — useful for comparing mount load capacity | 4.6kg | 7.5kg |
Tube Material | Steel | Steel |
What's in the box?
| Spec | Sky-Watcher Quattro 150P | Sky-Watcher Quattro 200P |
|---|---|---|
Diagonal Tilts the eyepiece 90° for comfortable viewing — useful on refractors |
Blue highlight: Sky-Watcher Quattro 150P advantage · Amber highlight: Sky-Watcher Quattro 200P advantage · Greyed cells: equal or subjective.