Mirror-lens telescopes

A mirror lens telescope is a variation of optical systems that can be both reflective and refractive. Such a structure began to complement car headlights, a lighthouse, such inventions are used in microscopes and telescopes. Devices can be called catadioptric, they differ from catoptric, because they consist of spherical mirrors and are characterized by the presence of lenses.

History
The mirror-lens telescope was invented in 1930 in the hope of combining the best properties of reflector and refractor telescopes as a mirror in one system with a lens. It was invented by an optician from Estonia B. Schmidt. As the name suggests, these designs include mirrors and lenses. Based on this, an image is created, and the lenses correct visual aberration, increasing the property of the acquired picture.


The optician was fortunate enough to achieve a full increase in the field of view and the volume of light, but his development of a mirror-lens apparatus became too difficult to manufacture, because of this, great popularity could not be achieved. In the future, the device was modified and improved, and at the present time the invention has found application.
Device and principle of operation
Catadioptric telescopes include a rather complex layout. The path of the rays along the tube goes several times, due to this, the apparatus becomes miniature even at high magnification. The structure of such a telescope includes a lens, a mirror, and when magnified, this reduces the distortion of the picture, that is, you can clearly see the object.
But there is one thing - such an optical system should be placed in advance in the place from which you want to observe, due to different temperatures of the air and the telescope, the device may not work correctly.

The device itself is small in size, which is an advantage, since it can be taken with you to the fresh air or installed in the house, for example, on a balcony. The magnification of such a telescope is quite large, it will easily allow observing the planets. From it you can look at the Far Space, however, it greatly increases and therefore will not allow you to see in full length. But in general, in terms of characteristics, it is an excellent tool.


Advantages and disadvantages
The advantages of such a telescope:
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the picture quality is very high over relatively short distances;
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very easy to use in operation;
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such a telescope does not need tuning;
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great focusing, even at a small size;
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compact enough;
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the pipe is closed, but thermal stabilization is needed;
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suitable for a balcony.


Disadvantages:
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quite high price;
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no thermal stabilization;
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the telescope is suitable only for planetary focusing;
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color may be distorted when viewing an object.

It is worth knowing that the principle of operation of all devices is not based on approximation, but in the amount of light. This means that everything depends on the size of the light-collecting element, it can be a lens or a mirror, if the parameters are good, then there will be a lot of light.
In the modern world, telescopes are constantly changing, they can replace the body, lenses and mirrors, but still their principle remains the same. There are many mirror lens telescopes available and they vary in price.

Reflective telescopes can be distinguished by their design, as it is classical. Such instruments are similar to a telescope, but on a tripod. They are quite high quality and clear in the picture due to the fact that they have multiple lenses. For example, such a telescope is usually used to view the moon, large stars, planets, and is also suitable for daytime observations. However, you won't be able to look deep into space because they don't focus in low light.


How to choose?
Catadioptric mirrors are based on concave and diagonal mirrors. These telescopes are much cheaper to build, and this affects their design. Thanks to this, you can buy such a telescope with a larger objective lens than a refractor. Often, such devices with a large lens perfectly focus on light, their direct purpose is to examine celestial objects, as well as phenomena in space that "burn" weakly.
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If you are new to astronomy, then take a look at the azimuth mount.
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For astronomers who are already professional in their field, the equatorial types are suitable.
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A telescope reflector is an excellent option.
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Refractor for a deeper study.


The pluses of refractors include cost, since they are usually inexpensive, such telescopes are small, there is no distortion in the image, and the apparatus is also stable. The tools are not small, so this is not suitable for everyone.
Mirror is more for knowledgeable and understanding astronomers, since it will be more difficult for beginners with it, because they look at it at an angle, inexperienced people may not understand.

Top Models
As for the best telescope models, each apparatus is good in its own way, the market provides various types and types. Mirrored lenses are suitable for everything, for example, for observations in the house or in the air. All models of these telescopes have a high image, and they also have reliable optics. For convenience, you have to choose yourself. Models:
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if you want to quickly look into space, then the model Celestron Astro Fi great - great option;

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suitable for beginners National Geographic;

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for the younger generation, purchase Meade Polaris 90 mm;


- if the mirror is important to you, then Sky-Watcher BK MAK127 AZGT SynScan GOTO, good in all endeavors.

But if you always want to explore in open space, then turn your attention to reflectors. If you prefer to watch near the city, then a refractor will be an excellent choice. In order to examine objects and get vivid and unforgettable emotions, you need an appropriate apparatus, it all depends on you and your desire, since there are plenty of types of telescopes.
