Don't Let the Wrong Telescope Kill Your Hobby
More people give up astronomy because of a bad first telescope than for almost any other reason. Cheap, low-quality instruments sold at department stores often promise absurd magnifications (like "500x power!") but deliver blurry, frustrating views. Buying the right telescope from the start makes all the difference.
This guide will walk you through what to look for, which types suit different needs, and what to realistically expect at different price points.
The Most Important Spec: Aperture
If there's one number to focus on when choosing a telescope, it's aperture — the diameter of the main mirror or lens. Aperture determines how much light the telescope gathers, which directly impacts image brightness and detail.
- 60–70mm: Entry-level. Good for the Moon and planets, but limited on deep-sky objects.
- 80–100mm: A solid beginner range. Good planetary views, some nebulae and star clusters.
- 114–130mm: The sweet spot for beginner reflectors. Noticeably better views of deep-sky objects.
- 150mm+: Intermediate and above. Excellent for galaxies, nebulae, and planetary detail.
Ignore claims about magnification — magnification is determined by the eyepiece, not the telescope itself, and too much magnification produces dark, blurry images.
The Three Main Types of Telescopes
Refractors
Refractors use glass lenses to gather and focus light. They're durable, low-maintenance, and produce sharp, high-contrast images. Classic small refractors (60–80mm) are great for the Moon and planets. The downside: larger apertures become expensive quickly.
Best for: Beginners who want simplicity and portability; Moon and planetary observing.
Reflectors (Newtonian)
Reflectors use mirrors instead of lenses and deliver the most aperture for your money. A 114mm or 130mm Newtonian reflector gives noticeably better deep-sky views than a comparably priced refractor. The trade-off is occasional mirror alignment (collimation) and a design that's slightly bulkier.
Best for: Beginners on a budget who want to see galaxies and nebulae.
Dobsonians
A Dobsonian is essentially a large Newtonian reflector mounted on a simple, easy-to-use alt-azimuth base. Dobsonians offer tremendous aperture for the price, making them favorites among amateur astronomers. An 8-inch (200mm) Dobsonian can reveal incredible detail on deep-sky objects and is surprisingly affordable.
Best for: Anyone serious about deep-sky observing who doesn't need a motorized mount.
What About Computerized (GoTo) Telescopes?
GoTo mounts use motors and a built-in database to automatically point the telescope at thousands of objects. They sound appealing, but for beginners there are caveats:
- They require a setup and alignment process each session.
- They cost significantly more than manual mounts of similar aperture.
- Many experienced astronomers argue that learning to find objects manually builds a better understanding of the sky.
GoTo mounts are a genuine advantage for experienced observers who want to maximize observing time. For beginners, a well-made manual telescope often provides better value.
Mounts: The Unsung Hero
Even a great telescope performs poorly on a wobbly, unstable mount. Look for a mount that feels solid, moves smoothly, and allows fine adjustments. The two main types:
- Alt-azimuth (AZ): Moves up/down and left/right. Simple and intuitive.
- Equatorial (EQ): Tilted to align with Earth's rotation axis. Essential for long-exposure astrophotography.
Recommended Starting Points by Budget
| Budget | Suggested Type | What You'll See |
|---|---|---|
| Under £/$150 | 70mm refractor or 114mm reflector | Moon craters, Saturn's rings, Jupiter's moons |
| £/$150–300 | 130mm reflector or 5" Dobsonian | Above + bright nebulae, star clusters, galaxies |
| £/$300–600 | 6"–8" Dobsonian | Excellent deep-sky views, detailed planetary work |
One Final Tip
Before buying anything, try attending a local astronomy club star party. Most clubs welcome visitors and let you look through a range of telescopes. Seeing through a well-collimated 8-inch Dobsonian for the first time can completely change what you decide to buy — and the community support is invaluable for beginners.