What is a sight

The origin or optical aiming device is difficult to verify.It is said that at least in the 16th century Europe, some people have tried to fix the glasses lens on the butt.There are text records that before the 19th century, the firearm had a long -mirror -type aiming device, which could be used for aiming under low light conditions.The scope can be divided into holographic scope, internal red and green scope, and laser sight.

Blame classification

The scope is mainly divided into the following three categories: the long -term scope, the precipitation scope, and the reflective sight.Among them, the Wangyuan sight and reflective sight are the most popular.The above two types of sights are mainly used during the day, so they are collectively referred to as the white light scope. In addition, there are night vision sights for night aiming (adding night vision devices to the above two types of sights, and night vision device according to night vision deviceThe types of types can be divided into micr -light sights, infrared sights (can also be subdivided into two types: active infrared and thermal imaging).

What is the principle of the scope

The scope has both enlarged function and the function of fast aiming.Natural light is absorbed from a optical fiber -made lighting system at the top of the aiming mirror, and a targeting mark is formed by a split plate and then reflected into the eyes of the shooter.

Both the bullets and the sight can be seen as a ray approximately. Two rays located in the same plane and in one direction are either parallel or intersection. In fact, the point in the scope is exactly the ray of the scope and the ray of the bullet.The intersection, the parabolic line of the bullet and the sight line have two focus, as well as the target sight.

The intersection of the scope of the scope and the ray of the bullet may not necessarily fall on the target. This requires adjusting the distance between the scope of the scope and the intersection of the ray of the bullet.In order to adjust, the viewing angle of the sight installation is needed according to the target distance.If you want to make precise shooting, you need to consider the impact of the wind direction, which is the so -called repair.

Is the scope a prohibited product?

At present, it is not included in the category of prohibited products. The sight can be regarded as a collection of things, such as the sights replaced by the collection equipment, which is normal.

The scope generally does not belong to a prohibited item. The criterion for measuring the non -committing is whether there is any harm to others and whether it harms others and national interests.The scope is not a military weapon, not to mention that ordinary sights are only attributed to toys (unable to compare with military regulations).

There is also the purpose of this sight. If it is used to sin or harm the interests of others, of course, if not, it is just a normal Tool.

1. Harm of children's Telescope

Like everything, it depends on how to use it.

The regular Telescope has a precision requirements.

As long as you don't stop like watching the computer all day, you will not let go of eating and drinking water, then as long as it is a regular product, there will be no disadvantages if there is no damage.

Of course, there is another premise that the operation is correct.Do not use Telescope to aim at strong light sources, like the sun.

If children or adolescents, in growth and development, whether watching TV, computer, watching a long mirror or reading, should not be too long, and it is good to stop. Of course, you can go out to see the scenery, which is better.

2. How to choose a Telescope for children

1. Try to choose refracted Telescope.The refraction mirror is easy to operate, observed intuitive, easy to maintain, long use cycle, children can easily master operating skills when using, and it is easy to find and track when watching the target.

2. The diameter of the Telescope should not be greater than 100 mm.Many enthusiasts say that trying to choose a long -caliber Telescope, which is right for senior enthusiasts for conditions and licenses, but for observation needs that only cultivate children's interest, the caliber within 100 mm is enough because it is enough because the diameter is sufficient because it is enough because it is enough because it is enough because it is enough becauseThe caliber is not just expensive, but the Telescope is heavier.From the perspective of children's physical strength, it will reduce the usage rate of Telescopes. The fun of seeking stargazing is inevitable, and equipment is inevitable.The author recommends a Telescope with a caliber of 70 to 80 mm.

3. Try to choose a product with equatorial instrument.The equatorial instrument is not only easy to operate when tracking and looking for targets. What's more important is that it has a concept of redtrayal redness. As long as you master this concept, if you need to buy any other high -level and complex Telescope in the future, it will be lightly carried by the operation.Essence

4. With a 45 -degree positive prism.At present, the astronomical Telescope on the market is mostly equipped with a 90 -degree sky mirror.In this way, the imaging of the Telescope is upside down, and the upper and lower appearances have no effect on the astronomical observation.Because the celestial bodies in the Telescope are generally spherical or a point.Astronomical observation is generally at night. During the day, the moon and occasional moon are except the sun (not using a Telescope to directly observe the sun), leaving only the nature and human landscape around us.However, natural and human landscapes are also the goals of observation. There are also a lot of pleasure in observation. As long as the refractive astronomical Telescope is added with a 45 -degree positive prism, it becomes a multi -purpose equipment for viewing the landscape. Children can also from it.Get more happiness!

5. The price of the Telescope.Combined with the current Telescope market, the refraction mirror of 100 mm and ordinary optical glass is generally between 500 yuan and 3,000 yuan according to different workmanship, accessories, and metal materials (low -end inferior products are not in this column).Higher than this price, it is relatively professional.

MoreTelescopeprice reference & gt; & gt;

6. brand.When you buy a Telescope, you must choose a brand with a wide range of sales services and the public.

The correct method and maintenance method of astronomical Telescope

1. Install a astronomical Telescope according to the instructions.

2. Regarding the focus of the Telescope and the calibration of the cross -line mirror

Loose two fastening screws on the eyepiece.Take out the low -duty mirror and put it on the eyepiece to pick up the cylinder, and then tighten the screw.The adjustment of the focusing knob can obtain a fuzzy image of an object A in the distance, and then slowly adjust the coke knob back and forth until the object image is clear.The Telescope has accurately adjusted the focal length, and now it can be observed with a star -seeking mirror.If the astrology mirror is not at the focal length, turn the eye mirror until a clear scene appears.When the object of object A you see on the Telescope is not in the center of the star mirrors, according to the following method: tighten or release the screw on the star -seeking mirror support, so that the star -seeking mirror up and down, left and right workers, left and right workers, left and right workers, left and right workMove obliquely.When the object of the object A appears in the center of the cross line, your star -seeking mirror is ready, and finally the three screws are tightened.Then replace the low -power mirror with a high -power mirror and repeat the above program.If the center of the image observed under the maximum mirror and the cross -line center of the star -seeking mirror, your star -seeking mirror is adjusted.Now you can quickly find the celestial body you want to observe.In extremely special circumstances, star -seeking mirrors may need to be adjusted.

3. precautions

A. Under any circumstances, first look for objects with a star -seeking mirror, because the perspective of the star -seeking mirror is greater, which can greatly accelerate your coarse tone.

B. Under normal circumstances, first install a low multiplier mirror to gradually increase the multiple you need, and you need to make the necessary focus when you change the mirror.

C. Don't be troubled by the upper and lower, left and right images that you see, this is a normal situation for astronomical Telescopes.

4. Effective observation notice

If the Telescope gets outdoors for the first time in air with lower indoor temperature, it must be used for a few minutes-because the temperature difference will make the lens blindfold.This phenomenon will disappear after 15-20 minutes.If your eyelids or fingers touch the eyepiece, the cloth that can't afford the hair will be gently wiped to see the mirror to prevent blurred images.It takes about 30 minutes to enlarge your pupils to adapt to darkness, so use a Telescope at night. After half an hour, you can see a much dark celestial body.

5. Various factors that may affect the observation results Observation results are not all taken in the optical properties of the Telescope, and there are many factors that also affect the quality of the image.

A. The atmosphere surrounded by the earth is always moving. This kind of atmospheric movement and rotation will cause bad images at a high rate. Perhaps after a few nights, the observation will improve.

B. The heat on the surface of the earth will also cause the fluctuations of the air and make the image distort and deform, resulting in poor observation.

C. The observation angle of the Telescope and the star and horizon has a great impact on the observation effect: if the star body is close to the horizon, the goal will be blurred.

D. Pollution of light sources: use your Telescope (such as under street lights, under room Lights, etc.) as much as possible in a light -free environment, high -mortar astronomical Telescope is very sensitive to light.Even more obvious, it seems that many stars will disappear over the urban area.

E. Moonlight may also be another factor that affects observation. The dazzling full moon or bright moonlight will blur the nearby stars or planets, and the moon itself is the best observation state between darkness and Tianming.

f. Try to avoid observation from opening the window (let alone observation of closed windows), especially in the cold season, the indoor and outer temperature difference can be worse, which will make the observation quality worst.

G. The cloud layer accumulated in the sky cannot penetrate the observation, but this cloud will often move.

H, star flashes are caused by air convection, which will also affect observation.

Remember, in any case, do not directly observe the sun through a star -seeking mirror or main lens barrel, otherwise it will seriously damage your eyes.

How to maintain your astronomical Telescope

This product is an optical instrument. When using it, it should be carefully placed to avoid severe impact or vibration. When not in use, the front cover should be covered to prevent dust from entering.Do not put the Telescope in a place where the temperature is too high, too low, wet or chemicals volatilize.The glass surface of the Telescope has dirty or dirty brushes or wiping cloth to brush or wipe, and you must not wipe it with your hands.If you find that there are severe dirt, mold or institutional failure, damage, etc. inside the Telescope, do not dismantle it by yourself. You should send professional maintenance departments to handle experienced repair personnel.

How to make a Telescope by yourself

The Telescope is actually a Tool that looks closer to the distant objects.In order to realize this function, there is a device (objective mirror, also called a main mirror) on the Telescope to collect the light from the distant objects, and pass the light (image) to the focus of another device (eyepiece lens).Eliminate the image and pass to your eyes.According to the following steps, you can make a simple Telescope at home.

Simple self -made Telescope material

Two magnifying glasses -about 2.5--3 cm in diameter (if one of them is larger than the other, the effect will be better), a paper Tube -roll into a Tube with paper towels or gifts (a little growing a fewIt will be better), tape, scissors, a straight ruler, code ruler or tape measure, paper with content -newspapers or magazines.

Making steps of handmade Telescope

Take out two magnifying glass and a printed article.

Put a magnifying glass (the big one) between you and paper.The image on the article will look vague.

Put another magnifying glass between your eyes and the first magnifying glass.

Move the second glass back and forth until the printing content looks very clear.You will notice that the article looks bigger and is inverted.

Please help me to measure the distance between the two magnitude magnifying glasses and record it.

Cut a groove at about 2.5 cm in the front end of the paper Tube near the front end.Don't cut the roller.This slot can accommodate the larger magnifying glass.

Cut another groove on the paper Tube. The distance between this slot and the first slot is equal to the distance recorded by your friends.This is where the second magnifying glass is placed.

Put the two magnifying glass on the corresponding groove (large on the front, the small on the back), and fix them with tape.

Leave a rolling of about 1-2 cm behind the smaller magnifying glass and cut off the excess roll.

Use this Telescope to look at the paper printed with content to check whether it has made it successfully.You may have to spend some energy to determine the accurate distance between the two lenses, so that the image can focus.

You have made a simple refraction Telescope!With this Telescope, you can use it to observe the moon, some stars and things on the earth (such as birds).

The above is the method of making ordinary Telescopes. Let's take a look at how to make more professional natural Telescope.

Detailed explanation of astronomical Telescope DIY steps

Here I introduce to you the Cairple -style refracted Telescope that is easy to find. This type of Telescope is also the easiest to make. It does not have too high requirements. The field of view is large.In this society, it is relatively easy to find. Unlike the reflex, the concave mirror is not purchased from the manufacturer, it can only be made through its own hard grinding, and it may not be successful at one time.Our Telescope belongs to the entry level. It cannot be compared with those high -end, but it can also meet general observation requirements.It is still helpful for improving interest and knowledge of astronomy.

The first is the magnification rate of the Telescope, because it is an entry -level, in order to ensure the picture quality and clarity (that is, the resolution), we should not pursue the amplification multiples.Observation to the object is the humiliation of vision.Here I introduce to you a Telescope of about 30 times. It can clearly see the ring mountain on the moon. The largest planet Jupiter looks like a small disc. When the observation conditions are good, you can see it above it.The large erythema, as for Saturn halo, if your lens quality and handmade are made well enough, when the Saturn is large in the clear night sky, you can barely see something unusual around it, yes, that is, it is it itThe halo.

Astronomical Telescope production material

One piece of telephoto mirror, short-focus flat and convex (dual convex) lens 1-4 pieces, paper Tube (or rolling with paper by itself), glue, etc.

Astronomical Telescope mirror Making

First, the first is a material mirror. The caliber is about 50-80 cm at a caliber of about 5 cm. It mainly depends on what kind of focal length you can find. Theoretically, the larger the caliber, the longer the more focal length.It is better. This kind of lens is more difficult to find now. Unlike before, there are mail order kits. A lens with a caliber of 10 cm with a caliber of 10 cm is not a very difficult thing.It can be searched on the online shopping. Finding a lens with a focal length of 80 cm should not be difficult. My Telescope uses a flat convex lens with a diameter of 5 cm.Remember to be a flat -convex lens, dual -convex and new moon -type uneven lens, and the effect is very poor, mainly because the color difference and Qi change are very powerful.A combination of lens is generally between 1: 8 or 1:15, such as a lens with a caliber of 5 cm. Calculated by 1:15, 5x15 = 75 cm, our piece is 80 cm or it is okay or it is still possibleEssenceIf you press 1: 8, it is 5x8 = 40 cm, which means a lens with a diameter of 5 cm. The focal length is between 40-80 cm.The range of Telescopes that are too much will be very poor, just like you buy a magnifying glass with a caliber of 10 cm at a die shop. Its focal length is only more than 30 cm like this. Its proportion is far below the range of 1: 8There is only 1: 3, this kind of lens is not good. The image of the image observed is very powerful, unless you only plan to make a toy for children.

Astronomical Telescope lens production

The lens I use the whiteboard (thick paper) to roll the outer barrel, mainly to facilitate the installation of the lens barrel.allow.If your lens lens is also made by yourself, you can save this step, and just roll the lens lens to the same size as the diameter of the object mirror.The diameter of the objective mirror is 5 cm, and a 3 cm grating should be made, because it is not a chromatography differential lens. The color difference is still there. It can only be eliminated by sacrificing the caliber.If you spend hundreds of dollars from the Internet and get a lens with poor color eliminations, this grating can be saved, and it will not sacrifice the amount of light of the caliber.

Astronomical Telescope lens barrel production

I use some hard paper Tube to do it. You can go to the jet place to ask others.

The focal length of our objective mirror is 80 cm, and the length of the lenscin can only be about 20 cm shorter than the focal length. Because everyone's vision is different, we also need to make a mirror barrel to adjust to watch people with different vision.Generally, the hard paper Tube obtained in the workshop is relatively long. You can use a saw to see a short paper cylinder according to the focal length of the lens.

Astronomical Telescope eye mirror production

Next, make eyepiece. This kind of lens is the easiest to find everyone. You can buy almost on the ground. Here I use the amplifier of repairing clocks, because the eyepiece for this Telescope is the same.It is general. Of course, you can also use other lenses. The source of the lens is a variety of. Two two pieces of the focal length can form a composite mirror with a focal length of about 2.5 cm.The distance between the two lenses is two -thirds of the focal length of the single film. The focal length can be shortened to three -quarters of the original single -chop focal length. This ratio is seen in other books that make Telescopes, but according to my experience, let's take my experience.Two lenses directly ask about three millimeters, which can shorten half of the distance.

It is also very good to make a large magnification mirror. Its magnitude of the magnification is about 5 times. The focal length and the amplifier of the clock repair watch are about 4 cm.OK, but the magnification rate is small. If there is a single -block focal length of 3 cm, the lens is better, two pieces are fine, and the focal length can be about 2 cm.2.5 cm = 32 times. If the focal length of the eyed mirror is 2 cm, then its magnification is 40 times. If you get a magnifying glass with a focal length of 1 cm, the magnifying rate of this Telescope will reach 80 times.The magnification of the Telescope is that the focal length of the objective mirror is except the focal length of the eyed mirror is equal to the magnifying multiple. We cannot ignore the imaging quality for the blind pursuit of the magnification. In the same caliber, the higher the magnification, the darker the picture.Observation and watching the moon at night are okay. It is not necessary to see the stars. Even if your magnification is 200 times, it is still a small light spot in the Telescope.

Astronomical Telescope eye lens barrel production

Next, we want to make the eyewarbar, because we use the hard paper Tube of the inkjet material, and the lens barrel can only be rolled to the lenscin.The mirror barrel is done with about 250 grams of whiteboard cardboard (thick paper like kraft paper). It rolls a few layers to achieve a certain thickness. It feels like a certain strength.I usually roll 4-6 layers like this, because the whiteboard cardboard itself has a certain hardness, and it is convenient to curl. The rolled lens cylinder has a intensity and a little elasticity, which is very suitable.After the roll, you can make a light grid on the inner wall. It is best to make a few racks. According to the length of the lens barrel, I do a maximum of three, that is, a grating is made in a few centimeters in the diameter barrel.Reduce light reflex on the inner wall, so that observation is no longer affected by mixed light, and it has a great guarantee for imaging quality.Then make a eyepiece connection, which mainly inserts the eyepiece mirror to facilitate the replacement of different focal length eyepiece to form a different magnification.

Finally, use glue to stick the eyepiece to the diameter barrel.

Astronomical Telescope is made of front mirror

At this point, a Telescope is basically completed, but at this time, the scenes watched are upside down, which is upside down, which has little impact on astronomical observations, because the stars and planets are basically round, and it does not matter. If it is used during the day, it is used during the day.If you come to observe the scenery, it feels not so comfortable visually. At this time, you can make a positive mirror to improve this vision.It is positive, but the left and right are upside down, but this has little effect on viewing.The shell of the positive mirror is made of the corrugated paper of the packaging carton. It has thickness and a certain strength, and the materials are easy to find and easy to paste. A small mirror is sticking inside.Or the kind of disassembly in the slide, the average ordinary mirror is also fine, but it can only be used to watch the scenery during the day. It is not good to see the stars and the moon at night, because the coating is under the glass, and the glass has a certain amount of glass.Thickness, when the light is shot oblique, multiple reflexes occur between the silver -plated layer under the glass surface and the glass under the glass. The thicker the mirror, the more obvious the phenomenon of multiple reflexes. At this timeBecome multiple.This has an unnecessary impact on observation, so it is best to use the reflex mirror on the surface with silver or aluminum, and the mirror should be flat, otherwise the image will change.

After all the above were done, a Telescope was basically completed.

Types of astronomical Telescope

Optical Telescope is roughly divided into three categories: refraction type, reflex, reflective type.

1. Refractable Telescope

Advantages: The imaging is very sharp, sharp, and high.Connecting the "Positive mirror" can make the imaging not upside down, which is conducive to the observation of the ground scenery.It is easy to maintain and has a long service life, but be careful not to let the lens moldy.

Disadvantages: The price is high, and the same price can buy a larger reflected Telescope.There is still a little residual color difference in the ordinary color difference Telescope.The residual color difference is too small to ignore the price of the "reunion color difference Telescope" price and its expensive.

2. Petamina Telescope

Advantages: Low price (compared to the refraction mirror), the same price caliber, you can see more and darker celestial bodies.Imaging colorless difference.Cost -effective.Most of the large -caliber Telescopes of professional observatory are reflective structures.

Disadvantages: Daily maintenance is relatively troublesome.

Astronomical Telescope parameter

1. Activity

The diameter refers to the effective light diameter of the object mirror, which is often represented by the symbol "d".The ability to collect starlights is directly proportional to the Square of its caliber.Therefore, the greater the caliber of the objective mirror, the more likely it is to observe the darker celestial body.

2. Differential angle and resolution skills

The distinguishing angle is usually based on the angle seconds, which refers to the angle distance between the two light points that can be discussed by the Telescope.During the visual observation, the distortion angle of the Telescope = 140 (angle seconds) / d (millimeter), D is the effective caliber of the object mirror.The distortion of the Telescope is measured by the countdown of the distinction angle of the Telescope, so the larger the diameter of the Telescope, the better the discrimination.

3. magnifying rate

The magnification rate is the physical quantity of the visual Telescope, that is, the angle of the magnification.The amplification rate of the eyes Telescope is equal to the ratio of the focal length of the material mirror to the focal length of the eyed mirror. Therefore, as long as the differential mirrors are changed, the magnification of the Telescope can be changed.However, due to the limitation of the deduction of the object mirror, the magnifying rate of the Telescope cannot be increased without limit. Generally speaking, the amplifier rate is roughly 2D (the value of the 2 objective mirror diameter, and the caliber value is based on millimeter).During the observation, it is by no means the optimal rate of the maximum.If the magnifying rate far exceeds its magnifying multiplier limit, although the star statue looks larger, it does not increase its clarity. On the contrary, it will make the star statue blur, dimVery narrow.

4. Vision field

The sky corner diameter can be called the visual field of the Telescope corresponding to the area corresponding to the good imaging of the Telescope.The bigger the field of view, the wider the vision that sees it.The field of view of the Telescope is inversely proportional, the greater the magnifying rate, the smaller the field of view.Different diameter, different focal lengths, different optical systems (including objectives and eyepiece) and quality determine the size of the viewing field of the Telescope.When looking at the starry sky, if you use a large viewing Telescope plus a wide -angle mirror, you will feel like walking in the starry sky.

5, extreme star, etc.

"Xingwu" is an indicator of the brightness of the celestial body, which is often represented by the symbol "M".The smaller the value of the star, the brighter the star; the larger the value of the star, the darker the star.The difference between the stars is 2.512 times the difference between the brightness.Extreme stars refer to the stars with the darkest celestial body with a Telescope.The visual limit star of the Telescope can be roughly estimated by the following formulas: M = 2.1 5LOGD formula D (caliber) is based on millimeter.

Note: The light pollution in large cities will seriously affect the size of the extreme star, so the best observation location is to stay away from the outskirts of urban light pollution.

Astronomical Telescope mirror

1. Huachangs mirror (H)

It was developed in 1703.It consists of 2 slices of convex lenses, with a small view of the field, about 25-40 degrees. It is relatively short (the distance from the eyed mirror to the eyes) is relatively short.Patch mirror.Because the Wynos mirror is easy to make and the price is low, it is often used on a small entry -level Telescope.

2. Romans Deng mirror (R or SR)

It was a successful design in 1783, and it was also two flat -mirror structures with two convex mirror structures with the same focal length.The field of view is about 30-45 degrees.The ball difference, axial color difference, and distortion of Raraz Eye mirrors are less than Waisse mirrors, and the venue is also significantly reduced.But the distance from the pupil is also short.Both Romin and Wynos belong to the first generation of eyepiece.

3. Kylene mirror (K)

It appeared in 1849 and was composed of three lenses.It is developed on the basis of Ranzeson's mirror. The main improvement is to change the single -piece lighting mirror to the dual -glue combined color differential lens.Improve the image of the edge, and the effective field of view reaches 40-50 degrees.In the middle and low rates, the imaging quality of the Kylene mirror is better than that of Wets and Romin.In addition, the field mirror of the Kelna eye mirror is close to the focal plane, so that the dust on the field mirror is easy to images and affects observation, so pay special attention to cleaning.

4. Abbey disordered eye mirror (or)

In 1880, it was designed by Abe in Germany. It is a structure of four pieces and two sets. Among them, the field mirror is a three -gluble lens, and the mirror is a flat -convex lens.The degree of detecting, it also has a flat field of viewing at 40-50 degrees and sufficient pupil distances. It has performed well in each magnification and has been widely adopted.But the price is relatively high.

5. Pruden eye mirror (PL or Plossl)

Also known as "symmetrical mirror".It is a four -piece structure, consisting of two two sets of dual -gluing color differential lenses. Its parameter performance is equivalent to OR eyepiece, but PL eyepiece has a greater pupil distance and field of view.Because the two anti -colored differential gum compounds in PL eyepiece can be exactly the same, the cost ratio is low, and it is currently the most widely used eyepiece mirror.K, OR, PL belong to the second -generation eyepiece.

6. About the size of the eyepiece interface

There are roughly three interface specifications of the Telescope eye mirror: 24.5 mm (0.965 inches), 31.7 mm (1.25 inches), and 50.8 mm (2 inches).24.5 mm is mainly used for small entry -level Telescopes. 31.7 mm is the current mainstream size.50.8 mm is mainly used on high -end large -diameter Telescopes.

Astronomical Telescope selection guide

1. Comparison of the type of astronomical Telescope

1) The refracted astronomical Telescope is more convenient to use, the field of view is large, the star is bright, but the color difference is reduced, which reduces the resolution.The objective mirror of high -quality refractive mirrors is two double -separated color differential mirrors or 3 recovery differential mirrors.However, color difference or compound dispenusion difference can not completely eliminate color differences.

2) The advantage of the reflector astronomical Telescope is that there is no color difference.Commonly used reflectors include Newtonian and Cargreen.The former is simple and cheap, the spherical reflex mirror is on the back end, and the eyepiece is on the front side of the front end; the main and auxiliary mirrors of the latter optical system are non -spherical, the main mirror and eyepiece are behind.Essence

3) The refractive astronomical Telescope mirror takes into account the advantages of the refracted mirror astronomical Telescope and reflector astronomical Telescope: large visual field, good image, short lens barrel, easy to carry.Compared with the focal length and the refraction Telescope of the same caliber, the price is less than one -third of the price.There are two types of refractive mirrors: Schmith -Cargreen style and Mark Sotov -Kasseglin -style, which is also called the horse -card mirror.Horse -card mirrors have two types and three types.For example: Bosma1800150 astronomical Telescope and BOSMA2400200 astronomical Telescope are all three pieces. Because the image is better than two pieces, it is welcomed by domestic and foreign astronomical enthusiasts.

2. Reasonably choose the focal length of the astronomical Telescope

Choosing the focal length of a astronomical Telescope is related to the celestial body you want to observe.If you want to observe the nebula and find a comet, choose a short focus distance astronomical Telescope; if you want to observe the moon and the planet, choose the Changjiao astronomical Telescope; if you want to observe the two stars, gathering stars, changing stars, and star groups, it is best to choose a medium focus astronomy astronomytelescope.Mid -focus mirrors can take both ends, which are more popular.Usually short mirrors refer to the ratio of the focal length and caliber than or equal to 6, and the long mirror refers to the ratio of the focal length to the caliber than 15, which is called the mid -focal length mirror between the two.

3. Is the astronomical Telescope lens high and the high multiples are high?

According to the experience of long -term observation of astronomers, the maximum magnification of the astronomical Telescope must not be greater than the diameter of the 1.5 times (represented by millimeters). The Telescope with a caliber of 100 mm is observed.Times.The best tranquility can reach 190 times; when the caliber is 200 mm, it is observed in a medium of atmospheric tranquility, and it must not be greater than 170 times.At the best tranquility, it can reach 340 times; in fact, the maximum magnification of the bright celestial bodies can be doubled for astronomy enthusiasts, and even the caliber of the 2.5 times mirror (represented by millimeters).However, the multiples of the astronomical Telescope make the image bigger and darker, and at the same time, the atmospheric jitter has also enlarged, making the image more blurred.

4. Choose as much as possible astronomical Telescope

1) Large diameter, there are many light energy received, and you can observe a darker celestial body.

2) Large caliber, maximum effective magnification V is large, because V = main mirror diameter D (represented by millimeters).

3) Large diameter and high resolution. You can observe more details of the planet, you can distinguish the double stars, and it is possible to find darker asteroids and comets.In terms of resolution theory, it is only related to the caliber, which is actually related to optical design, processing and installation, and schools.Generally, the resolution of the popular science Telescope can reach 2 times the theoretical distinguishing angle, even if it is a high -quality Telescope, and the BOSMA1800150 is tested by the import metering instrument, the resolution is better than 1 , which is close to the theoretical value.

5. How to distinguish the optical quality of the astronomical Telescope

When buying during the day, you can observe a building in the distance with an astronomical Telescope to move the outline of the building to 1/4 of the vision. If the outline orange or blue -purple is particularly obvious, or the contour line is bent particularly, don't buy it.; Look at the leaves in the distance. Generally speaking, the 60 mm caliber Telescope can see the leaf tendons at 40 meters away. Don't buy it if you can't see it clearly.Of course, the larger the diameter of the astronomical Telescope, the farther it looks.Bosma70060 astronomical Telescope (caliber 60 mm) can see the leaf tendons outside 85 meters.In the evening, you can watch the stars. If you see the stars with color and particularly obvious, or the stars on the edge of the field of vision drag your tail, the length of the star is twice the size of the star. This astronomical Telescope is not suitable for astronomical observation.

6. Detection of resolution of astronomical Telescope

The best way is to observe the double stars.For example: Tiaoya star is double star (near the cowherd star), the angle distance is 1 .4; Aries star is double star, corner distance 1 .The husband's star is a double star, with a corner distance of 3 .

7. Observation about planets

Observe the magnification of gold, wood, water, fire, and Saturn is the planetary small round face in the astronomical Telescope viewing field and the full moon seen by the naked eye.Therefore, it can be observed by observing Jupiter with a 50mm objective mirror. Venus and Mars can be observed with 80mm objective mirrors, and Mercury uses a 280mm objective mirror.

8. Observation about the sun sunspots

Big Kuroko can be seen with a small astronomical Telescope, while some small sunspots need to use a large astronomical Telescope to see clearly.Amateur observations generally use projection observations.Observe that the sun and the moon should use a Telescope with a caliber (D/F), it is best to be 1: 15-1: 20.You can also add a light bar in front of the mirror to reduce the caliber ratio.However, doing so will reduce the discrimination of the Telescope.

9. Observation about the moon

The moon has ring -shaped mountains, chain mountains, Yuehai, Moon Valley, grooves (dry rivers) and bright radiation stripes. A good astronomical Telescope can see very subtle details on the moon.The best magnification of the moon is (1 1.5) main mirror caliber (MM).

10. Scholar about astronomical Telescope

The stands of astronomical Telescope have two types: horizon and equatorial type, all of which have two vertical shafts.The vision of the astronomical Telescope is generally relatively small, and the larger the magnifying rate, the smaller the field of vision, so choose a bracket that will not shake due to wind blowing.