How to choose a telescope

The main specification you need to consider when choosing a telescope is its aperture, i.e. the diameter of its main mirror or lens. You can choose the telescope with the largest aperture and the highest price, but these may be too complex for a beginner. The larger the diameter, the more light the telescope will collect, allowing you to see fainter objects and more detail on bright, close objects, such as the Moon. A telescope of this size is probably a good starting point for a beginner.

There are also telescopes with computerized mounts that allow you to choose the object you want to view from a database, and then the telescope automatically moves to that object. Examples of telescope manufacturers include Celestron, Meade, Sky-Watcher, Orion, Explore Scientific, Zhumell and many others. Whichever reflector you choose, these telescopes are excellent for low magnification targets such as galaxies and many types of nebulae. First of all, don’t go for the cheapest telescope you can find.

Seeing Neptune and Uranus can be difficult with such a small telescope, but it is not impossible. Choose manufacturers who have experience in catering to beginners like you. Telescope sizes are listed by the diameter of the main mirror or lens. If you are looking for something larger, good mid-level telescopes range from 6″ to 8″ (150 mm to 200 mm) in size.

When I first got into astronomy, I spent several months researching which telescope to buy, and the truth is that most of the articles on How to Choose Your First Telescope out there weren’t very helpful. When I first got into astronomy, I spent several months researching which telescope to buy, and the truth is that most of the articles on how to choose your first telescope out there weren’t very helpful. One way to improve the wide-field performance of a telescope is to choose one equipped to accept larger eyepieces. Of course, the other extreme is to spend so little on your telescope that you end up with a useless toy.

Before you buy anything, you should determine what is important to you. Remember that you get what you pay for. Avoid telescope ads that put the magnification number first in the ad. Good telescope sizes for beginners range from 4.5″ to 6″ (100mm to 150mm).

For an in-depth exploration of this topic, see the article “How to Choose the Magnification of Your Telescope ” by legendary eyepiece designer Al Nagler. For an in-depth exploration of this topic, see the article “How to choose the magnification of your telescope by legendary eyepiece designer Al Nagler”. The main specification to consider when choosing a telescope is its aperture, that is, the diameter of its main mirror or lens. A telescope that claims to have a high magnification may have poor optics, an unstable mount or other drawbacks.

What good telescopes have in common

The GoPro HERO 10 Black moves up a notch in many areas, including delivering improved video quality, with smoother operation and improved intelligence. Plus, it comes with an accessory tray to store your cookies and, most importantly, two 1.25-inch eyepieces. The best thing about the Celestron StarSense series is that you can read the literature provided by the app for each target you observe. But if you’re a fan of the outdoors, or you live in a city and can’t see great views because there’s too much light pollution, you’re going to need a telescope that likes to travel with you.

This well-designed telescope is suitable for most types of astrophotography, although it is perhaps better suited for lunar and planetary astrophotography than for nebulae and galaxies, due to its longer focal length. The telescope body is mounted on a single-arm alt-azimuth mount, with a computerized hand control containing a database of 40,000 night sky objects. Of course, there are much cheaper options that can offer a similar view, as well as smaller 6-inch and 4-inch models of this same telescope with a lower price tag. One small drawback is that skywatchers have to manually push the telescope, as a motorized mount is not provided.

However, this model ticks all the boxes if you’re looking for a telescope that will help you easily study the parts of the cosmos that interest you most. The Sky-Watcher Heritage 114P Sky-Watcher telescope, despite being a small device, offers great features for those who want a small telescope to use for astrophotography. However, it is common practice to use the NexStar telescope’s batteries as a backup to an external power source so that the telescope’s operation is not interrupted. It comes with an equatorial tracking mount that allows the user to try their hand at higher exposure astrophotography, and its larger aperture will start to show more detail on all sorts of different objects.

It is a Dobsonian style telescope with a 76mm aperture reflecting optical tube, which makes navigating the night sky really easy, all you have to do is point the tube and take a look. Swiveling is a very smooth process with this telescope, and some models of the SkyScanner 100 offer a tripod. Not only do you get a decent sized refractor telescope with a 120mm aperture, but it comes with a well-respected EQ3-2 equatorial mount. The aperture of smaller telescopes is often the limiting factor, but this telescope has a sizable 4.5-inch aperture – not huge, but by no means negligible.

Amazon is currently selling the NexStar 8SE with a bundle of other great stargazing add-ons, including an eyepiece and filter kit with 14 accessories and a telescope adapter. Aiming to provide clear views of the Moon and planets beyond, it features a large 130mm lens and promises a wide field of view. Many people want an old-school style telescope that looks good in their bedroom or living room and won’t move. It has a large 8-inch aperture and good light gathering ability, which means you are guaranteed a clear view of many deep space objects with this advanced telescope.

The telescope itself is well suited for general observing and photography, but is perhaps best for lunar and planetary photography. It comes with a 2x Barlow lens that doubles the magnification of the two included eyepieces, for example, giving 56x magnification in the standard 25mm eyepiece instead of 28x, and a whopping 140x in the 10x eyepiece instead of 70x. Many modern telescopes are sold as complete systems and come with a mount, but depending on the product, you may want to consider getting a better mount. Note that you only get the basics here: no finder is provided to help with navigation.

The set is a good choice as a first serious telescope for astrophotography and, with practice and patience, offers the potential to produce some impressive images. The telescope can be rotated automatically on both axes, at five different speeds, via the electronic keypad on the mount. The entry-level AW 70mm refractor telescope is compact, lightweight and small, and with such a small design, it’s easy to carry and store. Luckily, Celestron has a lightweight, portable telescope called the Travelscope 70, which is lightweight, mobile, and even comes with its own backpack, making it perfect for traveling, hiking, and any other outdoor adventures.

While more experienced users will want a scope with a little more oomph, this lightweight tabletop design is a great option for kids or anyone else who might have trouble with a larger scope on a tripod. Another nice feature is the Freedom-Find dual encoder technology, which allows you to move the scope manually on either axis without losing your alignment or position information. Whatever your budget, your astronomy experience, or the targets you’re most interested in, there’s a great telescope for you, and we’ve rounded up the best ones. Instead of two mirrors or a mirror and a lens, the compound telescope contains two mirrors and a lens.

It ships in two boxes, one with the tubular telescope and one with the unassembled rotating base. Slightly annoyingly, this telescope cannot be removed from the tripod, should you want to use it as a tabletop device. It is fair to say that, if you are a beginner, you don’t want to waste precious time setting up your telescope when you could be using those moments to observe. As the size of the telescope aperture increases, so does the amount of light you can gather and see clearly, so faint and blurry objects become clear.

But for the price, it’s ideal for beginners, travelers, and even kids who don’t know if they’re going to keep up their new hobby for very long. Of course, cramming optical technology into a smaller, lighter mount is going to mean a slightly less premium experience when it comes to tripod and lens quality, as well as magnification. The Orion SkyScanner 100 employs a sturdy tabletop mount, which oscillates along the altitude and azimuth axes, so skywatchers will need to be sure to use a sturdy tabletop for stable observations of the night sky. All too often I have heard the story of a family buying a “value telescope” and abandoning it out of frustration due to poor quality hardware, difficulty of use, or disappointment in their images.

There are also a wide range of accessories available, such as a device that allows automatic alignment with the night sky. The telescope also includes a Canon-D electronic cable release, which allows automatic control of the DSLR in up to six preset positions. Refractor telescopes, one of the most common types of telescopes, are the versions often featured in popular media. The Zhumell portable altazimuth reflector telescope is a great choice for anyone who wants to get started in amateur astronomy.

Its optical system – a Newtonian reflector – will require collimation to perform at its best. Celestron is one of the best telescope brands out there, creating a huge range of devices aimed at all levels – that’s why many of the telescopes on this list are from Celestron. This reflecting telescope comes with two eyepieces to provide 50x magnification with the 20mm eyepiece or 100x with the 10mm eyepiece. It currently publishes the trade magazine British Photographic Industry News – BPI News for short – which is a member of TIPA, the International Technical Imaging Press Association.

The Schmidt Cassegrain telescope is very popular with amateur astronomers around the world, thanks to its user-friendly design. Some say that more magnification is better, and many cheaper telescopes emphasize telescope magnification. However, this uncomplicated design is ideal for those who don’t want the hassle of setting up a larger telescope, or for a new observer who wants to learn the sky. The NexStar 8SE is one of Celestron’s high-end computerized devices, which means it does the hard work for you and can automatically find over 40,000 celestial objects with the push of a few buttons.

In an ideal world, we’d like to have a larger number of eyepieces to offer even more opportunities for stargazing enthusiasts, but what’s included here is enough to get you going. We had this telescope fully assembled and ready to go in less than an hour, which, compared to the process for other Dobsonians, turned out to be quite fast. To ensure a view of the sky that is an adequate improvement over the naked eye, select a telescope with at least a 70 mm (2.8 inch) aperture.

how much a telescope costs

The characteristics of a good telescope will be defined by the intended use and needs of a particular user. We selected and evaluated 10 telescopes over the course of five months, giving each telescope its own test under a clear night sky in Portland, Oregon. It’s budget that would be considered mid-range for people who know about telescopes, yet would be expensive for beginners and those who don’t know much about them. A compound telescope, or Schmidt-Cassegrain, (sometimes called a catadioptric or Cassegrain for short) is a combination of two mirrors and a lens.

Today, most commercial telescopes are manufactured in China or Taiwan; the standardized manufacturing and testing methods used by these companies ensure more consistent optical quality than in the past, as well as increasingly affordable prices. If you go for the more expensive option, you will be amazed at the views you will get through these excellent telescopes. An entry-level astrophotography telescope costs between $800 and $1,500, and between $1,500 and $3,000 (or considerably more) for the higher-end models. While a great telescope for beginners, the Celestron StarSense Explorer LT 114 can also be enjoyed by intermediate skywatchers, especially those who want to spend less time setting up and more time observing.

A good Dobsonian, with an aperture size ranging from 4 to 8 inches (100 to 200 mm), it is the perfect telescope for anyone new to stargazing. The quality of the glass used, its coatings and the number of individual lenses that combine to form the telescope’s primary objective all contribute to the high cost. To use this technology, all the skywatcher has to do is download the StarSense app and take a smartphone image through the eyepiece, and the app calculates which stars are in the telescope’s field of view to calculate the astronomer’s orientation. Depending on whether you’re just starting out or if you’re looking for a professional telescope, the prices will differ.

So if your budget allows, take a look at telescopes equipped with FPL-53 glass, as they are more efficient at reducing chromatic aberrations. Although there are many DSO’s that can be seen with an 80mm telescope, many more can be seen with a larger aperture telescope. These telescopes are for beginning astronomers, and are designed to help you become familiar with the night sky. For example, while Cassegrain telescopes can get you started with moderately priced entry-level models, they can be prohibitively expensive.

That’s why we’ve put together a list of the most important things to know before buying a telescope for the first time. For an entry-level telescope, it’s best to look for a refractor telescope with a 70mm lens, such as the Gskyer refractor telescope. Two eyepieces of 20mm and 10mm are supplied with the telescope, providing magnifications of 20x and 40x.

types of telescopes

This is a small sample of the types of telescopes that engineers have created over the last few hundred years, and they will not be the last. One of the main determining factors is the type of light or particle being observed, including devices called telescopes that do not form an image or use optics. The first type of telescope ever designed was a refractor, designed by a spectacle maker in the Netherlands in 1608. This is a small sample of the types of telescopes that engineers have created over the last few hundred years, and they will not be the last. The first type of telescope to be designed was a refractor, designed by a spectacle maker in the Netherlands in 1608.If your goal is deep sky astrophotography, the choice of the right telescope will depend on the type of objects you want to photograph.

These are refracting telescopesRefracting telescopesThe lens of a refracting telescope refracts or bends light. Another advantage of refractors is that they tend to be sturdier than other types of telescopes, as their lenses are less likely to become misaligned. The biggest attraction of this type of telescope is that they are very compact, with tubes that are two to three times longer than they are wide. If you live in an area where dew occurs (which is almost everywhere), some sort of tube extension is essential to prevent dew from forming on the exposed corrector plate at the front of the tube.

Although Kepler’s invention meant more magnifying power for telescopes, it also inverted the image. Isaac Newton’s original invention of 1668, and the basis of most reflecting telescopes developed since. Like refractors, the tubes of these telescopes are sealed to prevent dirt and dust, which is a great advantage, especially if you are in an environment prone to such conditions. The light enters through a parabolic or spherical primary mirror, which bounces the light up the telescope to a secondary plane mirror, which sends the light into the eyepiece at a 90-degree angle.

So unless you can leave your telescope outside to cool down, catadioptrics are a poor choice for observing the planets quickly and casually. As a result of this central obstruction, the refractor can collect more real light in a smaller aperture than the Newtonian. When you get past the 16-inch aperture in the amateur market, especially for visual astronomy, the optical tubes are almost all Newtonian reflectors. As shown in the image, a soft cover is often placed over the frame to control stray light From refractor telescopes to infrared to Schmidt-Cassegrain telescopes, these tools take on a diverse range of looks and uses in various sizes.

In the following video, I talk about the type of telescope I would recommend for a beginner (a hand-held Dobsonian reflector). This doesn’t matter much when viewing the sky, but it does mean that the Newtonian is not suitable for daytime terrestrial use. I consider a Dobsonian reflector to be the best type of telescope for a beginner because of its combination of ease of use, functionality and affordability. The three main types of telescopes are refracting telescopes, reflecting telescopes, and catadioptric telescopes.

Like apochromatic and achromatic lenses, a super achromatic corrects aberrations by focusing on different colors at the same time. Catadioptrics also take longer than any other design to cool to night air temperature, which is necessary to produce pristine, high-power images. Some are affordable and intended for beginners in science, others are high-tech and expensive, built for professionals to view distant galaxies with the latest and greatest features. Invented in 1611 by Johannes Kepler, the Keplerian telescope uses convex lenses to widen the field of view from Galileo’s concave lens prototype.

Refracting telescopes use lenses that combine at least two, and up to four, pieces of glass as the objective (the primary light-gathering device). For these reasons, small refractors are well suited for those looking for an instrument that can be grabbed and carried, or for those who don’t feel like tinkering with optics. Larger designs, typically 14 inches or larger, move from a solid tube to a frame design that allows the OTA to be disassembled for easy transport. Optical telescopes can be classified by three main optical designs (refractor, reflector, or catadioptric), by sub-designs of these types, by how they are constructed, or by the task they perform.

These highly tuned lenses are built with expensive fluorite glass to achieve the best kind of image correction. This means you won’t need a large equatorial telescope mount as you would for some of the larger types of telescopes. A refractor is the stereotype of what a telescope is supposed to look like: a long, bright tube with a large lens in front and the eyepiece at the back. It is not uncommon to see Newtonian reflectors on the mass market up to 16 inches, about 400 mm aperture and larger.

Below are the three main types of telescopes, including the advantages, disadvantages, and some examples of each type of telescope that I have experience with. This refraction causes parallel rays of light to converge on a focal point; while non-parallel rays converge on a focal plane. This style was invented by Sir Isaac Newton in the 1680s and became popular because of its greater image clarity. Refractors are a type of telescope constructed with lenses that refract light and send it along a focal path within the telescope tube.

This type of telescope creates chromatic aberration, a kind of blurring around the outside of the object being viewed, as the light waves are scattered toward the edges. Small refractors also perform at their best as soon as they are taken outside, while large reflectors and catadioptrics give mediocre high-power images until their mirrors reach the temperature of the outside air, which can take an hour or more. Like an achromatic telescope, the apochromatic type of telescope uses a special lens to correct for chromatic aberration.

References:

  • Best telescopes 2021: Top picks for beginners, viewing planets, astrophotography and all-arounders | Space
  • How to Pick the Best Beginner Telescope | The Planetary Society