Make a small telescope and ask a professional.

Hello, homemade telescope, there are two principle structures.

One: It is two magnifying glasses, the objective lens is small magnification, and the eyepiece is large magnification. This structure has a wide field of view, the multiples are easy to size, and the materials are easy to find. But if you don't have a prism, then it's like it's upside down.

Another: a magnifying glass, with a small multiple, is the objective. A concave lens, with a large power, is an eyepiece. The advantages are like positive. Disadvantages – The advantages of the above methods correspond to each other.

Of course, the two I mentioned are just models, and the real regular telescope is still more complicated, not only the material and lens are different.

You can learn about the structure of the telescope's lenses. - The so-called "convex lens" in it - in fact, in the real production, it uses a complex design of lens groups - as if you know that the lens of the camera is a convex lens - the real professional camera lens is a complex lens group inside. ）

The rule is that the magnifying glass (reading glasses) of the objective lens is smaller, and the myopia lens of the objective lens has a larger power, the greater the magnification of the telescope you make!

A real telescope lens is, of course, a professional lens, which is very different from the lens used in everyday life.

That kind of "electronic" doesn't exist at all, and the movie is made up or deceitful. It doesn't exist at all - so if you make it, it's not called it, it's called "invention" ==

The diameter of 1cm is also too small. I have 60mm caliber lenses with a focal length of 220mm and you can do it with this. Isn't it "electronic" to take a DSLR or camera?

As the name suggests, the telescope was originally used to look far away, but some special scenes can be used to make a fire in the wild, use the telescope objective lens to disturb the sun, focus on the fire, and make a fire through the principle of Li infiltration magnifying glass.

1. Meeting, drama, sports, outdoor activities, etc.: choose telescope products with a magnification of 6-8 times and a compact shape.

2. Ornamental birds: Choose products with a magnification of 7-8 times, a large objective lens diameter, and a compact telescope product.

3. **Outdoor games on large fields such as football: It is suitable to choose wide-field telescope products with a magnification of 7-8 times and an objective lens diameter of 20-50 mm.

4. Use at the water's edge or in a humid environment: Choose a telescope product with waterproof function.

5. Tourism, mountaineering, leisure: Choose products with a magnification of 7-8 times, a large objective lens diameter, and a compact telescope product.

If you look farther, you can also see closer.

Remove it as a magnifying glass.

It can also be used as a minimum.

Unload it to focus on the fire in the wild.

Telescope : A telescope is an optical instrument that uses lenses or mirrors and other optical devices to observe distant objects. Light rays that are refracted through a lens or reflected by a concave mirror allow them to enter a small hole and converge for imagery, and then pass through a magnifying eyepiece to be seen. Also known as:"Claircase"。

The first purpose of a telescope is to magnify the opening angles of distant objects, so that the human eye can see details with smaller angular distances. The second function of the telescope is to feed the beam of light collected by the objective lens that is much thicker than the diameter of the pupil (up to 8 mm) into the human eye, allowing the observer to see faint objects that were previously invisible. In 1608, Hans Lieberch, a Dutch optician, stumbled upon the idea that he could see in the distance with two lenses, and he built the first telescope in human history.

After more than 400 years of development, telescopes have become more and more powerful, and the distance of observation has also become farther and farther. In 1609, Galileo Galilei, a native of Florence, Italy, invented the 40x double-mirror telescope, which was the first practical telescope to be put into scientific applications.

1. Concert.

2. Sporting events.

3. Bird watching. 4. Outdoor sports.

5. Used by astronomy enthusiasts for stargazing.

About telescopes, just read this one!

1. The difference between an astronomical telescope and an ordinary telescope:

1. Multiples and uses are different.

Ordinary telescopes have a magnification of about 8-15 times, which is suitable for observing near targets. Ordinary telescopes are compact, small and portable, so they can be carried around during travel, and can also be used in concerts, sporting events, and other occasions.

Astronomical telescopes have large magnifications, most of which can reach 50-100 times or even more than 200 times, and are mainly used to observe celestial bodies, and occasionally low-power eyepieces can also be used to observe ground targets. Astronomical telescopes are complex and bulky, making them difficult to carry around when traveling.

2. The structure and optical principle are different.

Although ordinary telescopes are small, but the sparrows are small, the necessary parts are highly integrated, and the inside of some products is completely sealed, with waterproof and dustproof functions. Ordinary telescopes are divided into binoculars and monoculars, and most of the products on the market are binocular. In terms of optical principle, there is only one kind of "refraction", but its prism structure is divided into Paul type and roof type.

The astronomical telescope has many parts and can be disassembled, and the inside of the lens barrel is not sealed, so it cannot be used in high humidity or dusty weather, otherwise water vapor and sand will enter the lens barrel and affect the use. In terms of structure, astronomical telescopes are basically monocular, and they need to be connected to a tripod when they are used.

In terms of optical principle, in order to achieve a longer observation distance and better imaging effect, the optical structure of astronomical telescopes is eclectic, and there are three types of refraction, reflection and catadioptric type, which are more common, and the direction of the picture needs to be changed by the orthographic zenith mirror or orthographic eyepiece (some astronomical telescopes are not equipped with relevant orthographic mirrors, because they are not sensitive to the direction of the image when observing celestial objects).

3. The difficulty of use is different.

Ordinary telescopes are easy to use, and can be used directly by adjusting the focal length and interpupillary knob to get the best imaging effect, and can be easily used by people of any age.

Astronomical telescopes are a little more complicated to use, first of all, you need to understand some astronomical telescopes and astronomical knowledge, children need to use them under the guidance of adults, otherwise they may not see anything. In addition, it is also necessary to continue to explore and improve in the process of use.

4. **Different.

The ** of ordinary telescopes is relatively low, generally more than 200 yuan can buy good quality products, some I products even only cost a few dozen yuan, and the more expensive models are generally about one or two thousand yuan.

Astronomical telescopes are different according to aperture, optical principle, configuration, etc.

There are products ranging from 300 to 400 yuan to hundreds of thousands of yuan, which can be used by astronomy enthusiasts with different observation needs.

2. Astronomical telescopes and microscopes have different structures and cannot be substituted for each other.

1. Astronomical telescopes are not suitable for seeing landscapes. There are many differences in the design, such as astronomy has high requirements for center sharp plating, low requirements for the clarity and distortion of the edges, and the requirements for viewing are balanced, which must reach a certain level.

2. Astronomical lenses often use long focal length lenses, and the field of view is very narrow, and this aspect is not suitable for products that see scenery.

Many people want "astronomical telescopes" and think that astronomical telescopes are "large multiples", but in fact there are deep misunderstandings in them, many of which are misleading by some film and television works - the police handling the case use an astronomical telescope to monitor the actions of criminals.

This can't be done in the real scene, because the astronomical telescope is specially designed for stargazing, and the picture doesn't care about the front and back, so there is no prism in it, and the images are all inverted, even if the orthographic mirror (also called the zenith mirror) is added, the imaging is also reversed.

The design of the astronomical telescope is also different from the high-powered desktop (tripod) viewing scope that specializes in observing the scene, and the astronomical telescope looks at point-shaped targets, so the size of the field of view is not required, and the telephoto ratio lens is used. For specialized ground viewing, the size of the field of view is very important, and the viewing scope uses short-throw lenses. Therefore, when you look at the scenery with an astronomical mirror, you will feel that the field of vision is extremely narrow, and the imaging is reversed, so most people, after buying it, will not use it a few times, and then they will be idle in the corner, and their interest is completely lost.

In addition, the current low-end astronomical telescope market is relatively chaotic and mixed. This is also the reason why we rarely recommend ordinary people to choose astronomical products.

In short, the astronomical telescope is specially designed for viewing the sky, many indicators that are very important for the viewing effect, the design of the astronomical telescope does not pay attention to, and the viewing effect of the same grade astronomical telescope is far less good than that of the ordinary desktop telescope (such as the field of view, the clarity of the edges, color reproduction, etc.). For non-astronomy enthusiasts, desktop telescopes are more versatile and have a better overall effect than astronomy.

Let me give you a general overview of the differences between astronomy and other telescopes. First of all, you should state that you want to use it to see astronomy? Or is it used to see things?

At least explain "what is it mainly used for"? Let's talk about the astronomical telescope first, there are some basic misunderstandings, its practical use of it to look at the stars, except for 3 stars and a moon, looking at other stars is the same as the naked eye, but the number of star points is a little more. Therefore, it is recommended to get in touch with a real telescope first, and if you like it, it is not too late to buy it.

Astronomical telescopes can't see colored stars, that's through the camera, for a long time**, and the naked eye can't see the appearance of color. So, if you're not an astronomy enthusiast, watching astronomy can be boring. - Astronomical telescopes, on the other hand, are generally considered not suitable for viewing objects, and the field of view is much smaller than high-powered desktop (tripod) viewing scopes specially designed for viewing objects, because you don't need to pay attention to the field of view to see the stars.

And even with the addition of zenith mirrors, astronomical telescopes are still not suitable for viewing! Because the zenith mirror is reversed from left to right, it looks awkward. There are many reasons why it is awkward to find a target, as well as the difference in optical design, etc.

I won't go into details. - And if you are mainly used to see astronomy, rather than to see things, then choose an astronomical telescope, which is more suitable for astronomy. In short, what do you want to use, choose the corresponding product, and don't be strange, such as looking at the scenery but choosing an astronomy, you look at the knowledge introduction, about the introduction of astronomy.

In terms of multiples, if it is astronomical, it is generally 50 times or 100 times. If it is a view, it is generally a multiple of about 20 60, of which about 25 times I personally think is the most suitable multiple for viewing. More than 40 times, it is not suitable to see the ground scenery, because of air flow disturbance and other reasons.

In short: you grasp a principle, your main purpose: are you mainly used to view the scenery, to assist in watching a little astronomy?

Or is it mainly used for astronomy and auxiliary viewing? If you are looking at the main scenery, then choose a high-powered desktop (tripod) viewing scope. If it's astronomy-based, then choose an astronomical mirror – don't turn it upside down.