Telescope Comparison
Bresser Messier N-150/750 vs Sky-Watcher Explorer 130M
The specs are close. The experience isn't.
First light
Bresser · 150mm · £229
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 · 130mm · £258
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
The full picture
The numbers that separate these two scopes — and what they mean at the eyepiece.
Aperture
Bresser Messier N-150/750 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 Explorer 130M's longer focal length reaches higher magnification with the same eyepiece — better reach for planetary detail. Bresser Messier N-150/750's shorter focal length gives a wider true field — better for large open clusters and extended nebulae.
Focal ratio
Bresser Messier N-150/750's faster f/5 delivers wider fields with any eyepiece — better for open clusters and large nebulae. Sky-Watcher Explorer 130M's f/6.92 provides more magnification per eyepiece — better for fine planetary detail.
Mount type
Same mount type — setup experience and ergonomics will be similar. Differences lie in build quality and included accessories.
Weight (OTA)
Sky-Watcher Explorer 130M's optical tube is 1.5kg 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 | Bresser Messier N-150/750 | Sky-Watcher Explorer 130M |
|---|---|---|
| Planets | ||
| Moon | Excellent 150mm resolves craterlets, rilles, and mountain shadows with crisp detail; f/5 handles high magnification well on lunar targets | Excellent 130mm aperture and 900mm focal length reward high-magnification lunar detail — craters down to ~3km visible in good seeing |
| Saturn | Good Rings clearly defined, Cassini Division visible in steady seeing at 150–200x; focal length of 750mm is adequate but not ideal for high-power planetary work | Good Rings clearly defined, Cassini Division visible in steady seeing; 900mm focal length is just short of the 1000mm sweet spot for planetary scale |
| Jupiter | Good Two main cloud belts and GRS visible; 150mm shows some detail in the equatorial bands at 150x+ | Good Two main cloud belts and Galilean moons easily seen; GRS and subtle belt detail require patience and good seeing |
| Mars | Good Disc and polar cap visible at opposition; some dark surface markings detectable in good seeing | Moderate Disc visible at opposition with polar cap; surface albedo markings are fleeting at 130mm |
Deep sky | ||
| Orion Nebula (M42) | Excellent Bright nebulosity with extensive structure visible; Trapezium resolved; f/5 gives good wide-field context | Excellent Bright nebulosity and Trapezium resolved; 900mm focal length frames the core well but crops some of the wider nebula extent |
| Andromeda Galaxy (M31) | Excellent 750mm focal length and 150mm aperture show the core, dust lane, and outer halo in a wide-field eyepiece | Good Bright core and inner halo visible; 900mm focal length frames the central region but outer spiral arms extend beyond the field |
| Open clusters | Excellent Wide field at low power frames clusters like the Double Cluster and Pleiades beautifully | Good Compact clusters like the Double Cluster and M35 look striking; larger clusters like the Pleiades won't fit in a single field |
| Globular clusters | Good 150mm begins to resolve stars at the edges of M13 and M22; cores remain granular but not fully resolved | Moderate M13 and M3 appear granular at high power but individual stars remain mostly unresolved at 130mm |
| Faint galaxies | Good 150mm pulls in galaxies across Virgo and Leo as defined smudges; brighter examples like M81/M82 show shape and contrast | Moderate M81/M82 pair visible as elongated smudges; faint galaxies need dark skies and averted vision at this aperture |
| Milky Way / wide field | Good 750mm focal length is slightly long for sweeping panoramas but still delivers rich star fields at low power | Moderate 900mm focal length gives a narrow field — rich star fields are better served by shorter instruments or binoculars |
Other | ||
| Double stars | Excellent 150mm aperture resolves sub-arcsecond pairs; f/5 is forgiving enough with quality eyepieces, though less clean than f/10+ refractors | Excellent 130mm resolves sub-arcsecond pairs; near-f/7 focal ratio gives clean diffraction patterns for colour doubles like Albireo |
| Astrophotography (planetary) | Good 150mm at 750mm focal length works well with a planetary camera and Barlow; no tracking needed for short video captures | Not applicable |
| Astrophotography (deep sky) | Not recommended The included EQ mount has no motor drive or tracking — long exposures are not possible without upgrading to at least a single-axis motor | Not applicable |
The real tradeoff
Both scopes are capable. The question is which one fits the way you actually observe.
Bresser Messier N-150/750
- You'll spend a few minutes on polar alignment and assembly just like the 130M, but once you're at the eyepiece that extra 20mm of aperture and the fast f/5 cone give you noticeably wider true fields — the Pleiades fit in a single view, and faint galaxies in Virgo show up as definite smudges rather than maybes.
- You'll reach for the dual-speed Crayford focuser constantly and appreciate it every time — racking in that last fraction of focus on Saturn's Cassini Division or a tight globular is genuinely easier here than with the 130M's basic rack-and-pinion, and it's the single feature that punches most above this scope's price.
- You'll need to collimate more often and more carefully than with the slower 130M, because f/5 is unforgiving — if you skip it, stars at the field edge turn to seagulls, and a coma corrector becomes a near-essential upgrade rather than a luxury.
Sky-Watcher Explorer 130M
- You'll save £50 upfront and get a scope that's genuinely good on planets — the longer 900mm focal length means you can push a 6mm eyepiece to 150x without needing premium wide-angle glass to control coma the way the faster Bresser demands.
- You'll feel the mount's limitations every session: after every focus tweak or nudge the tube wobbles for several seconds, and in any breeze you're waiting rather than observing — this is the price you pay for the lighter EQ2 under a tube that's really at its limit.
- You'll find yourself making frequent slow-motion corrections at high power because there's no motor drive, but the upside is you'll learn equatorial mechanics hands-on — and if you add a motor later, lunar and planetary imaging becomes a realistic next step without buying a whole new mount.
The dark side
Every scope has a personality. Here’s where each one gets difficult.
Bresser
Bresser Messier N-150/750
The f/5 focal ratio produces noticeable coma at field edges with wide-angle eyepieces — budget for a coma corrector if you plan to use anything wider than a 60° apparent-field design.
The included EQ mount has no motor drive, so at 150x and above objects drift out of the eyepiece quickly, and any aspiration for long-exposure astrophotography requires a mount upgrade the scope's price doesn't account for.
The mount is rated adequate for visual use but reports of flexure and vibration with camera equipment mean even adding a motor won't turn this into a reliable imaging platform.
Sky-Watcher
Sky-Watcher Explorer 130M
The EQ2 mount is marginal for the tube's weight and length — vibrations take several seconds to damp after touching the focuser, which actively interrupts observing at higher magnifications.
The included 25mm and 10mm eyepieces are basic Kellners with narrow apparent fields, so you're looking through a tunnel compared to what either scope could deliver with better glass.
The 6x30 optical finder shows an inverted image and can be fiddly to align — combined with the need for polar alignment, your first few sessions may involve more setup frustration than stargazing.
Which is right for you?
Two different buyers. Two different right answers.
The sky-learner's equatorial scope
Bresser · Bresser Messier N-150/750
You want the most light-gathering and the widest deep-sky fields you can get under £250, and you're willing to learn collimation and budget for a coma corrector down the line. You'll love the dual-speed focuser the moment you try to split a tight double star or nail focus on a faint galaxy, and you're okay that the mount is functional rather than exceptional — because you're spending your money where it matters most, at the front of the tube. This isn't for you if you want grab-and-go simplicity or plan to hang a camera off the back without a serious mount upgrade.
The sky-learner's equatorial scope
Sky-Watcher · Sky-Watcher Explorer 130M
You're starting out, your budget is firm at under £200, and you want an equatorial mount you can learn on before deciding whether astrophotography is worth investing in later. The 130M gives you genuinely rewarding planetary and lunar views and enough aperture to enjoy the brightest deep-sky targets, and the longer focal ratio is more forgiving of cheap eyepieces and imperfect collimation. This isn't for you if shaky vibrations after every touch will drive you mad, or if you're already sure you want the widest, faintest deep-sky views — the Bresser's extra aperture and faster focal ratio will serve that goal better for only £50 more.
Our verdict
At similar price points, these scopes offer different amounts of aperture per pound. The Bresser Messier N-150/750 gives you more light-gathering for your money — and for visual observing, aperture per pound is the most useful single metric.
For pure optical value, the Bresser Messier N-150/750 is the stronger pick. The Sky-Watcher Explorer 130M compensates with other features — decide whether those trade-offs justify the premium. If I had to choose: the Bresser Messier N-150/750 — more aperture per pound means more sky.
Bresser Messier N-150/750
View Bresser Messier N-150/750 →Sky-Watcher Explorer 130M
View Sky-Watcher Explorer 130M →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 | Bresser Messier N-150/750 | Sky-Watcher Explorer 130M |
|---|---|---|
Apertureⓘ The most important spec — bigger = more light = better views | 150mm | 130mm |
Focal Length Longer = more magnification potential | 750mm | 900mm |
Focal Ratio Lower f-number = wider field of view; higher = more magnification per eyepiece | f/5 | f/6.92 |
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 coated | Parabolic primary mirror with multi-coated optics |
How do you point it?
| Spec | Bresser Messier N-150/750 | Sky-Watcher Explorer 130M |
|---|---|---|
Mount Type The mechanical system that holds and moves the telescope | Equatorial | Equatorial |
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 | Bresser Messier N-150/750 | Sky-Watcher Explorer 130M |
|---|---|---|
Focuser Size 2" accepts wider eyepieces and gives better low-power views | 2" | 1.25" |
Focuser Type Rack-and-pinion is standard; Crayford and dual-speed are smoother | Dual-speed Crayford (2" with 1.25" adapter) | Rack and pinion |
Size & weight
| Spec | Bresser Messier N-150/750 | Sky-Watcher Explorer 130M |
|---|---|---|
OTA Weightⓘ Optical tube only — useful for comparing mount load capacity | 5kg | 3.5kg |
Total Weightⓘ Full setup including mount — this is what you lug to the car | 13.5kg | 9.2kg |
Tube Length | 670mm | 640mm |
Tube Material | Steel | Steel |
What's in the box?
| Spec | Bresser Messier N-150/750 | Sky-Watcher Explorer 130M |
|---|---|---|
Eyepieces Included eyepieces — more is better, but quality matters more than quantity | 25mm and 10mm eyepieces | 25mm and 10mm Kellner |
Finder Scope Helps you locate areas of the sky before switching to the main eyepiece | 8x50 optical finder | 6x30 optical finder scope |
Diagonal Tilts the eyepiece 90° for comfortable viewing — useful on refractors |
Blue highlight: Bresser Messier N-150/750 advantage · Amber highlight: Sky-Watcher Explorer 130M advantage · Greyed cells: equal or subjective.