How to judge the magnification of a telescope

To give you a simple way to know how many times your telescope actually has, according to what you call magnification, it's actually a close magnification, which means that if your telescope is 20 times, then you can see with a telescope at a distance of 20 meters, which is equivalent to seeing from a distance of 1 meter without a telescope, so according to this logic, you can write a word on a wall that is 1 meter away from you, and the size of the word should be just enough for you to see with the naked eye at a distance of 1 meter Then take your telescope to a place 20 meters away from the wall to see If you can see clearly, then congratulations, your telescope is really 20 times (note: the wall should be very well lit, otherwise unless you have a telescope transparency, otherwise you can only see a cloud of darkness and it is best to use a tripod or find a chair to make the telescope stable, do not hold the telescope in your hand to see, otherwise it will dangle and you can't see clearly) If you can't see the words clearly from a distance of 20 meters, then move slowly until you can read the words clearly Then measure the distance between yourself and the wall, for example, 8 meters, then it means that your telescope is actually 8 times, and now the market sells more than 12 times, and even what 15 to 75 or 100 times the multiple of the telescope is basically a false standard, even the big brands of ** may not be able to guarantee a high magnification of the real standard, like the Yukon River 30*50wa monoculars that I spent more than 400 oceans to buy, the target is 30 times, according to my method, the actual measurement is only 16 times to 18 times, so even so This magnification is already very powerful for a hand-held telescope, 20 meters away, you can see the name on the business card, and of course, this also depends on the strong transmission of this telescope, and if the transmission is not good, you can't see it clearly, no matter how large the magnification is.

Hello! The magnification of the telescope = the magnification of the eyepiece * the magnification of the objective.

7 50 = magnification 350 times.

10 25 = magnification 250 times.

7x and 10x, the following numbers are the objective aperture in millimeters.

350 times ??? 250x ???

Isn't this a misguided child...

7 50 = 7 times the distance between the object and the aperture of the objective lens of 50mm.

10 25 = 10 times the distance between the object and the aperture of the objective lens of 25mm.

The magnification of the telescope = the magnification of the eyepiece * the magnification of the objective.

It's talked about in biology books.

Usually people actually come into contact with telescopes, and most people should be able to know that telescopes can help you see things far away, and you usually use telescopes to look at the stars. The telescope can be adjusted, and the magnification is what does it have to do with that?

In fact, I will use telescopes to look at the stars in the sky, and the telescope does provide a lot of convenience for everyone. The telescope can be magnified, and the magnification can be further adjusted, we have no way to see very far things with the naked eye, but we can see things very far away with the help of the telescope, the distance seen by the human eye is very limited, but the magnification of the telescope is very much, and ordinary telescopes can magnify 10 times. The reason why the telescope can be magnified is actually because of the lens of the telescope, which can actually help everyone to take multiple images, and then you can magnify the magnification.

Here I will also give you a detailed introduction to telescopes, although everyone usually comes into contact with telescopes in life, but everyone may not know so much about telescopes. There are some telescopes with special structures, which can actually measure the length. Although this lens is not reflective, it allows the telescope lens to be smaller than the focal length.

But the magnification of the telescope is not the bigger the better, the magnification of the telescope must be moderate, if you adjust the magnification of the telescope to too large, you may find that your eyes are particularly tired, and looking at it for a long time will cause you to be very nauseous.

Therefore, you must use the telescope correctly, and you must check the relevant characteristics of the telescope in advance. Generally speaking, the larger the magnification of the telescope, the smaller the area you observe.

The telescope can be adjusted and the magnification is mainly related to the lens of the telescope, and the imaging of the telescope is a problem of multiple imaging, and the magnification is equal to the focal length of the objective lens divided by the focal length of the eyepiece.

This matter is related to the design and structure of the telescope, and also borrows the principle of convex lens. That's why you can adjust and magnify.

It is related to the focal length of the objective lens of the telescope and the focal length of the eyepiece, and it is related to the distance, and it is also calculated according to the diameter of the focal length imaging.

I think it's about the angle, it's about the lenses, so we have to look at it sensibly.

1. The representation method of the telescope with fixed magnification: magnification x objective lens aperture (diameter, mm), for example, 7x35 means that the magnification of this kind of telescope is 7 times, and the objective lens aperture is 35 mm; 10 x 50 means that the telescope has a magnification of 10x and an objective lens aperture of 50 mm.

2. The magnification of the telescope refers to the magnification of a telescope refers to the ability of the telescope to pull the object closer, such as using a 7x telescope to observe the object, the effect of the object observed 700 meters away is similar to the effect of the object observed by the naked eye 100 meters away.

3. The parameter of the exit pupil diameter is very important, but it is often overlooked. In fact, the exit pupil diameter is the maximum aperture of the camera lens, which determines the brightness of the telephoto field.

Let me first ask the landlord a question, how far can the naked eye see? Yes?

I'm ashamed to say that I can't answer. With the naked eye, the Great Andromeda Nebula (actually a galaxy, M31) can be seen 2.2 million light-years away, but it is powerless against an asteroid that is only a few astronomical units. It is obviously unreliable to have to give a number.

They are all optical instruments, and this is true with the naked eye, and astronomical telescopes are no exception, which cannot give an observation distance. Generally speaking, the measure of a telescope's ability to gather light is the ultimate magnitude, and popular telescopes are generally in the equivalence, that is, they can see objects that are hundreds of times fainter than the naked eye.

As for magnification, the answer is that if you want to brush the magnification, there is no problem with how high the magnification is.

In the Galileo era, in order to eliminate chromatic aberration, the telescope was once made more than ten meters long, and if today's ordinary eyepieces are used, the magnification of tens of thousands of times can be easily obtained. However, the famous Hubble telescope has a magnification of only 800-1000 times. Comparing the two, it is obvious that the magnification is meaningless.

Generally speaking, the magnification of a popular telescope is about 100 times, and no matter how high it is, it will be the opposite. In my observations, more than 95% of the time I use eyepieces with minimum magnification, the field of view is large, it is easy to find celestial bodies, and the deep-sky celestial bodies are bright. As for **As long as the multiplier is used as a selling point, I personally suggest that these merchants are unreliable, and it is better to find another place.

Here's how to identify the magnification of a telescope:

1.Through actual observation, it can be found that the magnification of the telescope is usually a range, such as 10x to 20x, because the eyepiece may have different magnifications.

2.For a given telescope, its magnification can be changed by replacing a different eyepiece. If the magnification of the eyepiece is higher, the magnification of the telescope will be higher.

3.The magnification of a telescope can be judged by looking at the size of distant objects. If a telescope is able to magnify an object to a larger size than the naked eye can see, then it will have a greater magnification than the naked eye can see.

4.The magnification of the telescope can be roughly determined by trying to observe an object with the naked eye at the same time, and then looking at the same object through a telescope, comparing the size of the two.

5.The magnification of a telescope can be calculated by measuring the diameter of the entrance pupil and the diameter of the exit pupil of the telescope.

6.The magnification of the telescope can also be determined by measuring the distance between the objective and eyepiece. If the distance between the objective and eyepiece is longer, the higher the magnification of the telescope.

It is important to note that higher magnification is not always better, as too high a magnification will reduce the stability of the image and will also increase the visual fatigue of the observer. Therefore, in actual use, you need to choose the appropriate magnification according to your own needs and actual situation.

1. For the finished telescope, the magnification of the telescope = the diameter of the entrance pupil and the diameter of the exit pupil. Generally, the entrance pupil of a telescope is the effective aperture of its objective lens, which can be measured with a caliper or ruler; If you point the telescope at a bright place, you can see a bright circle in its eyepiece (the eye is far away from the eyepiece), and measure the diameter of this circle with a ruler or caliper, that is, you will get the exit and the diameter of the pupil.

2. In addition, there is an intuitive but skillful approach, which is to observe a target with a uniform scale with the naked eye and through a telescope, such as a ruler closer or a building in the distance, with two pure eyes, respectively. Adjust the angle of your gaze so that the targets you see with both eyes coincide. At this point, you will see both an image of the target and a magnified image of the target. Directly compare these two images with the field, and you can directly get the magnification value.

Binoculars can reach 20x magnification and astronomical telescopes can reach 200x.

No matter how high the magnification is, the image quality will be poor, and there is basically no practical value. A telescope is an optical instrument that uses optical devices such as lenses or mirrors to observe distant objects.

The light passing through the lens is refracted or reflected by the concave mirror into the small hole for convergence imaging and then seen through a magnifying eyepiece. Also known as:"Claircase"。The first function of a telescope is to magnify the opening angle of distant objects, allowing the human eye to see details with small angular distances.

The second role of the telescope is to send a beam of light collected by an objective lens much thicker than the diameter of the pupil (up to 8 mm) to the human eye, allowing the observer to see dim objects that were previously invisible.

The magnification of a telescope is the focal length of the objective multiplied by the focal length of the eyepiece. Unlike microscopes, in principle, infinite magnification is possible, but magnification only makes sense if it is effective magnification.

The maximum effective factor is the number of millimeters of the objective aperture stool multiplied by 2.

Thus, astronomical telescopes will be massive, but in fact, objective lenses can not become infinite. Too heavy will increase the stability of the bracket, and double the brightness will decay into a square. So, in practice, the maximum usable magnification of a typical telescope will not exceed 300x. <>

1. The multiple of the telescope is the first number, and the last number is the clear aperture. Multiplying these two numbers has no specific effect, these are two separate parameters.

2. For example, 20x22 represents a magnification of 20 times and a clear aperture of 22mm.

3. The magnification of the telescope is theoretically inversely proportional to the field of view of the telescope, and the higher the multiple, the smaller the field of view. Therefore, the magnification of the telescope should not be too large. The 50mm caliber binoculars are weak, if it reaches 20 times, it is basically the limit, and if the multiples are large, the field of view is too small.

Basically unusable.

For example, you can see the logo "7x50", the number 7 in front represents the magnification, and the number 50 in the back represents the objective lens aperture (in millimeters).

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 "clairvoyant mirror".

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.

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.