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Which telescope should a beginner choose? A complete guide
Many people reach for a telescope thinking of seeing the craters of the Moon, the rings of Saturn, or the brightest objects in the sky. Such observations quickly draw you in and make you want to discover more. The problem usually arises when choosing the equipment. Beginners have to face a large number of models, different types of construction, and parameters that at first glance don't say much to a person just starting their adventure with sky observation.
In this guide, we explain which telescope to choose at the start, how the most popular constructions differ, and which parameters are worth paying attention to before buying your first telescope.
Is a telescope really the best choice to start with?
For many, a telescope seems like an obvious choice to start with, but it may not be the best option in every situation. If you are just starting to be interested in astronomy, live in a city, have a limited budget, or are looking for equipment for a child, it is worth considering buying an astronomical binoculars.
Good binoculars allow you to start observing the night sky without the need for setting up a mount or learning how to operate a telescope. They are lighter, more mobile, and allow for quick observation practically in any condition.
Even basic models enable the observation of the Moon's craters, brighter star clusters, the Milky Way, or the Andromeda Galaxy under a dark sky. In the case of Jupiter, one can also see its four largest Galilean moons.
For many, binoculars turn out to be the best way to check if astronomy will truly become a regular hobby before buying a larger and more demanding telescope.
Types of astronomical telescopes – how do they differ?
When choosing your first astronomical telescope, you typically have to decide between two constructions: a refractor and a reflector. Both types differ in construction, operation method, and application. This choice largely determines the comfort of observation and the possibilities of the equipment.
Refracting telescope (refractor)
The refractor uses a system of lenses that focus light and create an image. It is the simplest type of telescope to operate, often recommended for beginners.
Advantages of a refractor:
- no need for optics calibration,
- contrasting and sharp images of the Moon and planets,
- works well in cities and on balconies,
- simple operation and quick preparation for observation.
Disadvantages of a refractor:
- higher price for the same aperture,
- less capability for observing fainter deep-sky objects.
For whom? It is a good choice for beginners, children, and people observing the sky mainly from urban areas.
Reflecting telescope (reflector)
The reflector uses a system of mirrors that reflect light to the eyepiece. Such construction allows for a larger aperture at a lower price.
Advantages of a reflector:
- larger aperture for the same price,
- very good capabilities for observing nebulae and galaxies,
- advantageous price-to-capability ratio.
Disadvantages of a reflector:
- the need for periodic collimation (optics alignment),
- larger dimensions,
- worse convenience for city observations.
For whom? It is a good choice for those planning observations outside the city and users who want to develop the hobby more consciously.
Key telescope parameters – what to really pay attention to?
When choosing an astronomical telescope, many people are guided primarily by magnification, but it is not the most important parameter. In practice, greater importance lies in features responsible for the amount of collected light, image quality, and observation comfort. These are the ones that determine what you actually see through the telescope.
Aperture (lens or mirror diameter) – the most important parameter
Aperture determines the diameter of the telescope's lens or mirror. The larger it is, the more light the telescope gathers, and the brighter and more detailed the image is. It's the aperture, not just magnification, that has the greatest impact on the telescope's capabilities.
- up to 70 mm – basic observations of the Moon, brightest planets, and larger star clusters,
- 80–110 mm – clearer planet details, Saturn's rings, Venus phases, brighter nebulae,
- 150 mm and more – good capabilities for observing deep-sky objects, galaxies, and fainter nebulae.
For most beginners, an astronomical telescope with an aperture of about 80-150 mm will be the most versatile choice.
Focal length and magnification – a common myth
One of the most common mistakes when choosing a first telescope is focusing only on the magnification value. In practice, the telescope itself doesn't have "fixed" magnification — it depends on the eyepiece used and the telescope’s focal length. Magnification is calculated using a simple formula:
Magnification = Telescope focal length / Eyepiece focal length
For example, a telescope with a focal length of 1000 mm and a 10 mm eyepiece will provide 100x magnification. Using a 25 mm eyepiece will reduce magnification to 40x, but the image will be brighter and easier to observe.
It is important to remember that high magnification does not always mean a better image. If the telescope's aperture is too small, the image at high magnification will become dark, blurry, and prone to shakes and atmospheric conditions. For this reason, a good astronomical telescope should primarily offer adequate optic diameter and good image quality before high magnifications.
Mount – azimuthal or equatorial?
The mount controls how the telescope moves and tracks objects in the sky. For beginners, this is important as it affects ease of use.
- Azimuthal mount is simpler and more intuitive. The telescope moves vertically and horizontally, much like a camera tripod. It’s the best choice for those starting observations.
- Equatorial mount allows for easier tracking of the sky's rotation, which is significant for longer observations and astrophotography. However, it is more complicated to set up and requires learning how to operate.
It’s also worth mentioning Dobsonian mount — a variant of the simple azimuthal mount mainly used in larger reflectors. It offers a very good price-to-capability ratio and is often chosen as an astronomical telescope for beginners observing the sky outside the city.
Which telescope to choose for star and planet observation?
The choice of a telescope should primarily depend on what you want to observe. Different equipment is suited for watching the Moon and planets than for observing nebulae or galaxies. Therefore, before purchasing, it is worth deciding which objects interest you most.
Observation of the Moon and planets (Jupiter, Saturn, Mars)
The Moon and planets are the most common targets for beginner observers. Even a small telescope allows you to see the craters of the Moon, the phases of Venus, or the rings of Saturn, but the capabilities of the equipment grow with aperture:
- 70 mm – Moon craters, Venus phases, Saturn's rings, basic details of Jupiter,
- 80–100 mm – cloud bands on Jupiter, Galilean moons, clearer image of Saturn and Mars,
- 150 mm+ – more atmospheric details of planets and better sharpness at high magnifications.
It's essential to remember that planetary images seen through a telescope do not resemble colorful pictures from probes and the Hubble telescope. Visual observations are more subtle but can leave a big impression under good conditions.
For most beginners, a good starter telescope for planetary observations is a refractor with a 70–100 mm aperture on an azimuthal mount. This setup is easy to operate and works well even in the city.
Observation of nebulae, galaxies, and star clusters
Deep-sky objects, like nebulae, galaxies, or globular clusters, require a telescope that collects a lot of light. In this case, aperture and a dark sky away from city lights are crucial.
For such observations, reflecting telescopes with at least a 150 mm aperture work best. A larger mirror allows you to see more details of fainter objects and greatly improves image brightness.
One of the most popular first targets is the Andromeda Galaxy (M31) — the largest galaxy visible to the naked eye from Earth. In a dark location, you can spot it even with binoculars, but a telescope reveals many more details and nearby objects.
If you're pondering which telescope to choose for star and deep-sky object observation, a Dobsonian-mounted reflector will often be the best solution within a reasonable budget.
Sun observation – only with a filter
Observing the Sun through a telescope without proper protection is extremely dangerous and can cause permanent eye damage in just a fraction of a second.
Use only certified solar filters mounted on the front part of the telescope for solar observations. Never use random darkened glasses, sunglasses, or filters mounted at the eyepiece.
Which astronomical telescope on various budgets? Our recommendations
A good starter telescope should be tailored not only to the budget but also to the type of observation. With an increase in price, aperture, image quality, and the possibility of observing weaker night sky objects mainly grow.
Telescope up to £100 – a good start
A good choice is the Celestron Travel Scope 50. This compact refractor with a 50 mm objective lens is lightweight, easy to transport, and very simple to use. It is suitable for observing the Moon, the brightest planets, and terrestrial objects during the day.
For whom?
- beginners,
- children,
- casual observers,
- people looking for a portable telescope.
Telescope £100–£300 – larger observation capabilities
The SkyWatcher MAK-90 Virtuoso offers noticeably better optical performance thanks to its 90 mm Maksutov-Cassegrain design. It provides sharp images of the Moon and major planets, making it an excellent choice for regular observations and astronomy enthusiasts who want to progress beyond entry-level equipment.
For whom?
- people planning regular observations,
- beginners wanting to develop their hobby,
- observers focused mainly on the Moon and planets.
Above £300 – equipment with great potential
For users looking for advanced capabilities, the Sky Watcher Star Discovery MAK 102 is a strong option. Equipped with a 102 mm Maksutov-Cassegrain optical system, Go-To tracking, and Wi-Fi control, it makes locating and tracking celestial objects much easier. It performs very well during observations of the Moon, planets, double stars, and the brightest deep-sky objects.
For whom?
- ambitious beginners,
- astronomy enthusiasts looking for computerized tracking,
- observers who want a compact but capable telescope,
- people interested in both visual observations and basic astrophotography.
What not to buy? The most common pitfalls in choosing a telescope
The first telescope should encourage observation, not discourage after a few attempts. Therefore, it's worth paying attention to the most common mistakes:
- Cheap telescopes with very high magnification — at a small aperture, high magnification values are not practical. The image then becomes dark, blurry, and lacking in detail.
- A telescope not suited to the observation method — larger models provide better observational possibilities, but they are heavier and take up more space. If you plan frequent equipment transport, a too-large telescope may prove impractical. In such situations, beginners often use smaller and simpler constructions more often.
- Unstable mount and weak tripod — even good optics won't help if the image shakes with every movement. Stability greatly influences observation comfort.
Telescopes for beginners – what can you find at MILITARY?
MILITARY offers both basic telescopes for those beginning their astronomical journey and larger constructions intended for more demanding night sky observations. The offer includes light refractors that work well for observing the Moon and planets as well as reflectors with larger apertures, allowing observation of brighter nebulae, galaxies, and star clusters under a dark sky.
The first telescope doesn't have to be very expensive and technically advanced. The most important thing is that it is suited to the type of observation and encourages regular use of the equipment. A well-chosen telescope allows for observing craters of the Moon, planets, and the brightest deep-sky objects, potentially beginning a long-term passion related to astronomy.
