Choosing a telescope can be tricky. Many people wonder: which telescope should I buy?The range is vast, and not every model is suitable for the same purpose. Some want to see the rings of Saturn, while others are just looking for a scope for deep-sky or smart astrophotography. With our telescope decision tree discover at a glance which type suits you best.

Why this decision tree works

No long quiz and no chatbot, but a clear visual decision tree which leads you step by step to the right telescope. This way you can immediately see whether it is better to choose a refractor, Dobson, Maksutov, Schmidt-Cassegrain or smart telescope. Ideal for beginners, parents looking for a telescope for children, or those who want to make the step to astrophotography.

Why does the decision tree work when choosing a telescope?

Our decision tree was developed by Telescoop.co.uk specialists and matches the questions customers ask most often:

What is a good telescope for beginners?
Which telescope is suitable for the moon and planets?
What telescope can I use for astrophotography?
How much aperture do I need for deep-sky objects?

By capturing these questions in a clear decision tree, you don't have to dig through dozens of pages. One look at the flow chart gives you immediate direction.

What types of telescopes are there?

Maksutov telescopes
A Maksutov-Cassegrain is a compact lens/mirror combination. You get a long focal length in a short tube. Perfect for high magnifications, such as details on the moon and planets. They are low maintenance and easy to carry, but capture less light than a large Newton or Dobson - so deep-sky objects are of limited visibility.

Refractor telescopes
These are classic lens telescopes. They are popular with beginners because they require little maintenance and give sharp images of the moon, planets and double stars. One drawback: with cheap models you often see color errors (chromatic aberration). For deep-sky, refractors usually require a larger aperture, which makes them more expensive.

Schmidt-Cassegrain Telescopes (SCT).
This type combines mirrors and lenses. The result: a compact telescope with a lot of aperture and a long focal length. They are versatile: suitable for both visual observation and astrophotography. The disadvantage is that they are more expensive and may require a little more collimation (alignment).

Dobson telescopes
A Dobson is basically a Newton mirror telescope on a wooden swivel base. Big advantage: you get the most aperture for the lowest price. This makes Dobsons ideal for deep-sky objects such as star clusters and nebulae. They are easy to use, but less suitable for serious photography because they lack fine-mechanical tracking.

Smart Scopes
Smart telescopes like the Seestar S50 or DWARF 3 have been wildly popular in recent years. They are fully automated: aiming, tracking and photo stacking are done automatically through an app. Ideal for beginners or those who want quick results, even from the city. Disadvantage: the image sensors are small, making them less suitable for planets.

What do focal length and aperture mean?

Lens aperture
This is the diameter of the lens or mirror. The larger the aperture, the more light your telescope captures. This mainly determines how much detail you can see and how well you can make faint deep-sky objects visible.

70-90 mm aperture → good for moon and planets.
130-150 mm aperture → also deep-sky objects visible.
200+ mm aperture → serious detail in deep-sky.

Focal distance (focal)
The focal length determines the magnification and field of view. A long focal length (e.g. 1500 mm) gives high magnifications: ideal for planets and the moon. A short focal length (e.g. 500-650 mm) gives a wider field of view: better for star clusters and nebulae.

Choosing telescope for beginners

As a beginner, you will especially benefit from a telescope that is stable and easy to operate. A telescope that is ready within ten minutes and gives immediate results provides motivation to explore further.

Dobson telescopes are popular for beginners: lots of opening at an affordable price, and you set them down on a sturdy swivel base.
Refractors (Lens telescopes) are also suitable: low maintenance and ideal for the moon and planets.

What to expect as a beginner: craters and mountains on the moon, the rings of Saturn, the cloud bands of Jupiter and, under dark skies, even the Andromeda Nebula.

What telescope do I need for planets and the moon?

For planets and the moon, it's all about magnification as well as sharpness. For that, a telescope with longer focal length is often best.

From 70 mm aperture (refractor) or 114 mm mirror aperture (reflector) you can already see details clearly.
A Maksutov-Cassegrain or Schmidt-Cassegrain is ideal for high magnifications in a compact tube.
With an eyepiece around 10 mm, you can see Saturn's rings, Jupiter's moons and shadows in moon craters.

The longer the focal length, the larger the objects in focus - but make sure the telescope is also stable, or the image will vibrate away.

Which telescope is suitable for deep-sky objects?

Deep-sky objects (nebulae, star clusters, galaxies) are faintly dim. The more light your telescope catches, the better you see them.

Opening is all-important here: from 130-150 mm aperture deep-sky only becomes interesting.
Dobsons are favorites because they offer a great mirror for relatively little money.
The darker the sky, the better. In a city, you see mostly bright clusters and Orion; outside the city, nebulae and galaxies really come alive.

Can I take pictures with a telescope?

Yes, but there are two routes.

Smart telescopes such as the Seestar S50 or DWARF 3 do everything automatically: aiming, tracking and image stacking. You can thus take a sharp shot of a star cluster or nebula within minutes.
Classic setups require more knowledge: you place a DSLR or astrocam on a telescope with equatorial mount. This allows you to take deeper astrophotos, but it requires experience and additional accessories.

Important: Not every telescope is suitable for photography. Many entry-level models are intended purely for visual use.

What should I look for when buying a telescope?

A few simple rules will help you avoid misbuying:

Stable mount: choose a Dobson or a sturdy aluminum tripod. A wobbly tripod will ruin high magnifications.
No misleading magnifications: useful magnification is about 2× the aperture in millimeters. Claims of “675×” on small telescopes are not realistic.
Search tool: a red-dot finder or riflescope is essential for getting objects into focus.
Widescreen eyepiece: start with a 20-25 mm eyepiece. That gives overview, then you can zoom in with shorter focal lengths.
Simplicity: A beginner's model should be ready quickly and easy to use.

What does a good telescope cost?

The price depends on what you want to see and do:

€100-€300: simple refractors or small Dobsons, good for moon and planets.
€300-€700: larger Dobsons (130-150 mm) and first Maksutovs, with which you will also explore deep-sky.
€700-€1500: smart telescopes or larger Schmidt-Cassegrains, suitable for astrophotography and serious observing.
€1500+: advanced professional systems, with lots of opening or automatic tracking.

This will help you better assess which telescope fits your budget and goals.