| Key Specifications | |
|---|---|
| Aperture | 90mm (3.5 inches) |
| Focal Length | 900mm |
| Focal Ratio | f/10 |
| Optical Type | Achromatic Refractor |
| Mount Type | EQ2 Equatorial with slow-motion controls |
| Weight | ~8.6kg total (optical tube ~1.4kg) |
| Included Eyepieces | 10mm (90×) & 25mm (36×) — 1.25" |
| Finder | 6×30 external finder scope |
| Focuser | 1.25" rack-and-pinion (smooth, repeatable) |
| Best For | Lunar & planetary observing, learning equatorial mounts, crisp high-contrast views |
Refractors — telescopes with a primary lens rather than a mirror — are the "classic telescope" design. The Evostar 90 is an achromatic refractor, meaning it has two lens elements (crown and flint glass) that correct for chromatic aberration. Here's what you get:
The trade-off: For the same £230, you could buy a 130mm Dobsonian with 67% more light-gathering power. Refractors cost more per aperture inch. You're paying for optical quality and convenience, not raw light-gathering.
The EQ2 is a German-style equatorial mount — it tracks the sky by rotating on one axis (the polar axis) aligned north. Once you polar-align it, a single rotation follows celestial objects across the sky. Here's why this matters:
The trade-off: Equatorial mounts have a learning curve. Polar alignment takes 5 minutes once you know how (YouTube helps). The EQ2 is also heavier and more complex than a Dobsonian. Setup time is longer — maybe 10 minutes instead of 2. If you want "point and shoot" simplicity, a Dob wins.
A 90mm refractor gathers about 2.6× as much light as the human eye. That's less than a 130mm reflector, but the high focal ratio (f/10) and refractor contrast mean your views are sharper and cleaner on planets and the Moon.
Stunning. Craters, mountain shadows, rilles, and terminator detail. Refractors are where the Moon shines — no dust, crisp edges, unmistakable detail.
Cloud belts visible, Galilean moons as distinct points, and on steadier nights, storm detail and festoons. The contrast is excellent — belts stand out clearly against the disc.
Rings unmistakable. The Cassini Division (gap between main rings) often visible on steady nights at 90×. The globe shows cloud belts and polar regions.
Small even at opposition, but polar ice caps clear. Albedo markings (dark regions) visible. Not the detail you'd see through a 200mm, but definitely unmistakable.
The Pleiades, Hyades, Double Cluster in Perseus — all stunning. The 90mm easily resolves hundreds of stars in these fields. Deep-sky is limited by aperture, not by this scope's quality.
M42 (Orion Nebula) visible but subtle — greyish rather than the vibrant green in photos. M31 (Andromeda) a large fuzzy oval. Limit is brightness, not optics.
Note: All observations depend on light pollution, atmospheric steadiness (seeing), and dark adaptation. These are realistic views from a UK dark-sky site. Light pollution drastically cuts deep-sky capability — but lunar and planetary views stay crisp.
You could spend the same £230 on a 130mm Dobsonian reflector (the Heritage 130P). Both are excellent first scopes — they just prioritize differently. Here's how they compare:
| Factor | Evostar 90 (Refractor) | Heritage 130P (Reflector) |
|---|---|---|
| Light Gathering | 90mm — moderate | 130mm — 67% more |
| Lunar/Planetary | Superior contrast, crisp | Good, but slightly softer |
| Deep-Sky | Limited (small aperture) | Better (more light) |
| Maintenance | None — sealed optics | Collimation every few months |
| Setup Time | 10 minutes (polar align) | 2 minutes (point and shoot) |
| Learning Curve | Moderate (equatorial mount) | Minimal (Dobsonian) |
| Portability | Medium (less balanced) | Better (sits on base) |
| Astrophotography Path | Equatorial mount teaches fundamental skills | Dobs less suited to imaging |
In short: The Evostar 90 is for someone who values lunar and planetary excellence, wants zero maintenance, and doesn't mind learning an equatorial mount. The Heritage 130P is for someone who wants more aperture, easier setup, and simpler operation. Neither is "better" — they suit different priorities.
The Evostar 90 is respected as a solid planetary scope. Stargazers Lounge and CloudyNights threads consistently praise it for lunar and planetary work. Real owners report excellent colour correction (for an achromatic) and enjoyable views at high powers.
EQ2 mount gets mixed reviews. It's adequate but basic. It tracks smoothly once polar-aligned, but the counterweight system feels a bit flimsy, and the head rocks slightly under nudges. Not a deal-breaker, but not premium either. Many owners upgrade to a heavier EQ3 or EQ5 after a year.
The 6×30 finder works fine for learning. It's not a red dot, so there's a learning curve to "star-hopping" (using bright stars as stepping stones). But within a week, you'll be finding targets faster than someone with a red dot finder.
Most forum advice steers beginners toward Dobsonians. The raw aperture advantage is hard to ignore. The Evostar 90's refractor contrast and equatorial mount appeal to experienced amateurs more than true beginners. If you're drawn to the Evostar 90, odds are you know what you want — not just buying the cheapest scope.
Chromatic aberration is minor. Achromatic refractors show a faint purple fringe around bright objects. It's noticeable on the Moon at 90× if you're looking for it, but most observers report it doesn't interfere with enjoyment. Apochromatic refractors eliminate it entirely — but cost 3× as much.
These aren't essential, but they genuinely improve the experience:
A premium eyepiece for planets. Reveals detail the bundled 10mm can't reach. Crisp, comfortable, and the most popular planetary upgrade. £80–90.
~£85A wide-field eyepiece (68° apparent field). Makes the high f-ratio less claustrophobic when you want to explore clusters and nebulae. Much easier on the neck than the 25mm.
~£45At f/10, the Moon is blindingly bright. A neutral density filter (ND96) cuts glare and reveals shadow detail you'd otherwise miss. Essential for Moon observing. Often a polarizing filter works too.
~£11If after a year you want heavier, more stable tracking, the EQ3 is a natural upgrade. Same slow-motion controls, but steadier and better suited to larger optics. This is a future path, not essential now.
~£150–200See our eyepiece guide and accessories roundup for more detailed recommendations on filters, eyepieces, and mount upgrades.
The Evostar 90 is a specialist scope. It's not an "entry point" in the sense of being the absolute cheapest (you can find 60mm refractors for £100). But it's the smallest refractor that serious astronomers recommend for planetary work without frustration.
Stepping up from here means: If you love refractors, apochromatic refractors (90mm APO or 110mm APO) offer zero chromatic aberration — but they cost £400–700. If you want more light-gathering, a 130mm or 150mm Dobsonian is the natural alternative, though you lose the refractor contrast and equatorial mount. Some observers keep both — a refractor for planets, a Dob for deep-sky.
The EQ2 mount itself will eventually feel restrictive. After a year, if you've caught the equatorial-mount bug, the EQ3 or EQ5 (£200–400) offer heavier, smoother tracking — essential if you ever add a second scope or larger optics. Many Evostar 90 owners stay with the scope but upgrade the mount.
The Evostar 90 isn't a stepping stone — it's a complete observing experience with a specific purpose: excellent lunar and planetary views with zero maintenance. Whether you outgrow it depends on whether your interests drift toward deep-sky and larger apertures.