Telescope: How to choose the best one in 2021?
Today we are going to talk about a special item for explorers of the universe and galaxies, the spyglass. If you have ever looked at the sky and wondered what is there, you are not alone.
Every day, thousands of professional and amateur astronomers grab their telescope and point to the open sky. And there is never a lack of cool things to see!
But for that, it is necessary to have a good telescope. So, check out our article and get to know all the best models, advantages and disadvantages and start observing the space.
First, the most important
- The scope is a telescope model called a refracting telescope.
- You should buy a spotting scope according to what you want to observe.
- Never fully believe in the scope’s magnifying power described in an ad.
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Ranking: The 4 best telescope models
The best telescopes are great for detecting very distant stars, but they are not so useful for observing planets. So, choose a spotting scope, which you will be well served with when you see nearby stars.
The only problem is that astronomy can be quite complex, which makes it difficult to search. For this reason, we have separated some spyglass models to make your life easier.
The telescope is a complicated object that must be purchased with care and attention. For this reason, we have prepared this special Shopping Guide with all the information you need to know before choosing yours.
What is a spyglass?
A refracting telescope, also known as a telescope, is a type of optical telescope that uses a lens as an object to form an image. The design of the refracting telescope was originally used in spy glasses and astronomical telescopes, but it is also used for long-range camera lenses.
Did you know that telescopes were the first type of optical telescope?
The first practical refracting telescopes appeared in the Netherlands around 1608, and were credited to three individuals, Hans Lippershey and Zacharias Janssen, spectacle makers in Middelburg, and Jacob Metius of Alkmaar.
Galileo Galilei, who was in Venice around May 1609, heard about the invention and built his own version.
What are the advantages and disadvantages of buying a telescope?
Although large telescopes were very popular in the second half of the 19th century, the refractive telescope was replaced by the reflecting telescope that allows for larger lens apertures and is cheaper.
Despite this, there are still many advantages to owning a telescope. They are excellent for observing lunar, planetary and binary stars. In addition, it is an object that needs very little maintenance and is very robust, which can be a disadvantage if you are looking for a lightweight item.
- Easy to use and consistent due to simplicity of design
- Excellent for lunar, planetary and binary stars, especially with larger apertures
- The sealed tube protects the optics and reduces drafts that degrade the image
- Robust, needs little or no maintenance
- Its sealed tube protects the optics from image degradation
- They generally have small openings, 3 to 5 ‘
- Smaller openings mean less visualization of distant galaxies and nebulae
- Heavier, longer and bulkier than reflecting telescopes
- Good quality refractors cost more per inch of aperture
What is possible to observe with the scope?
Most people who buy their first spyglass want it to be perfect for viewing both terrestrial and astronomical objects. The truth is that, as attractive as the thought of a universal telescope is, terrestrial telescopes are usually bad for astronomy, the same applies to telescopes for observing stars.
So, it is important to decide what kind of observation you will make most often. Depending on what you are looking at, it may even be interesting to opt for a reflecting telescope. The telescope is indicated to observe:
- Nearby stars
- Shooting Stars
However, depending on where you are and the accuracy of your spyglass lenses, you will be able to see more or less objects, making it possible to even see more distant celestial objects.
What is the difference between spotting scope and reflecting telescope?
One of the biggest doubts of those who are going to buy a telescope is whether it is really different from the telescopic. The two objects are very similar. However, they differ in some ways that we will see below.
Fernando RoigPhD in Astronomy and Researcher at the National Observatory
“The telescope allows you to capture a greater amount of light than the human pupil and, therefore, allows you to see objects with very low brightness, which are not visible to the naked eye.”
Like the telescope, the scope is another item that allows you to observe celestial objects. However, it is a specific type of telescope. The scope is what we can call a refracting telescope, which uses objective lenses. Common telescopes, reflectors, use mirrors.
The disadvantage of the telescope in relation to the reflecting telescope is that it can generate a distortion of colors, making the image not so well defined, in addition to being a slightly less powerful item in relation to the distances that can be observed.
Spotting scopes are expensive. Identifying your budget helps you choose the ones that are right for you. However, like any other product, the higher the price, the higher the quality. For example, you cannot compare the quality of results from a $ 200 camera to a $ 10,000 camera. The same applies to telescopes.
Where to buy?
Buying a spyglass can be tricky, as you will need to turn to the specific websites that sell this type of product and which can be very expensive.
Another option is to bet on online sales sites like Amazon, which have a wide variety of telescopes at a more affordable price. In addition to these, the Free Market is another option for those who want to spend less and prefer to buy a used piece, since telescopes can be quite expensive items.
The telescope is a very difficult object to buy and must be chosen and handled with care.
Purchasing criteria: Factors that allow you to compare different types of scope
Whether you are researching to buy your first spotting scope or just looking to find out what is available on the market, here are some simple considerations and criteria to help you when choosing this equipment.
Optical equipment and terminology in the area are somewhat complicated matters, so we will help you understand each important point when choosing a telescope in a simple and straightforward way. Check out the main criteria:
- Lens size
- Ability to enlarge
- Telescope size
So, we will detail each of these items so that you can choose the best spotting scope for your observations.
The larger the objective lens, the more clearly you can enlarge the image when looking at the sky. The larger the scope of the scope, the heavier it becomes and the more difficult it is to move. In addition, the item becomes more expensive.
The most common lens sizes are around 70 mm to 90 mm, but lenses with even more than 180 mm are available on the market. It all depends on your budget.
Ability to enlarge
Don’t choose a telescope just for its announced magnification capability. The correct way to buy a telescope is by opening it. That is, the size of the objective lens or mirror. As a general rule, few telescopes can provide more than 50 x per inch of lens.
There are plenty of cheap telescopes out there, with inferior lenses, cheap materials and a weak frame that will only disappoint when you use them and will likely end up in a closet. A quality telescope can be used for many years, so forget about low quality ones.
Look for a spotting scope with a decent warranty period and a reputable brand. You may need repairs, so choose brands that provide support, technical assistance and advice.
The smaller the scope, the more frequently it will be used. Whether for terrestrial observation or astronomy, if you can pick up your small telescope and take it easily anywhere, you will use it much more often than if you need to prepare and move a large and complex piece.
On the other hand, larger telescopes may have a much better capacity than the more portable models. So, if you are looking for performance instead of portability, rest assured to choose a large scope.