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A complete guide to buying the best telescope for beginners and professionals

BingMag.com A <b>complete</b> <b>guide</b> to <b>buying</b> the <b>best</b> <b>telescope</b> for <b>beginners</b> and professionals

It is interesting to note that choosing the right telescope, along with a number of technical considerations, is deeply dependent on your observational interests, lifestyle, and budget. Many practical models start at prices in the range of 3 million tomans or more, although some training options are available for less than 1 million tomans.

Listen to a few key points that include the optical features of the device, stability during operation and hassle-free installation. It should be noted that other features of the telescope are of almost the same importance. Wide-field telescopes, for example, display larger objects and are easier to use than smaller options. At the same time, you should not neglect portability and ease of use, because the best telescope for you is the one you are really using.

Types of telescopes suitable for observation

BingMag.com A <b>complete</b> <b>guide</b> to <b>buying</b> the <b>best</b> <b>telescope</b> for <b>beginners</b> and professionals

In general, ground-based observation telescopes fall into three main categories, which include refractive, reflectance, and reflection-refraction options. The main difference between these telescopes is that each of them uses different optical properties to achieve a specific result. In fact, the goal is to make distant objects appear larger and brighter than what you see in your eyes.

Refractors Telescopes

Refractive telescopes are equipped with a lens on the front of their tube (this model of telescope is familiar to most people!). Although in most cases the cost of maintenance is low, but depending on the size of the aperture, the price goes up. In other words, buying a refracting telescope with a larger aperture also costs more.

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A refractive telescope with a lens on the front of the tube

Advantages:

  • best performance per inch The diaphragm
  • has a solid structure and is completely sealed
  • usually does not need to be readjusted each time!
  • Cools quickly.

Disadvantages

  • Highest cost per inch of aperture
  • This product has a long tube with an eye on the back of the device Is a factor to use tall foundations to install and deploy.

2. Reflectors Telescopes

Reflectors Telescopes are usually inexpensive, but require optical reset each time they are used!

Reflective telescopes collect light using a mirror behind the telescope's main tube. It is interesting to note that this style of telescope was first invented by Sir Isaac Newton in the 1680s. It should be noted that reflection telescopes are divided into two main categories: Newtonian telescopes and Kasgreen telescopes.

Reflective telescopes with a suitable aperture size are less expensive than all telescope models; But you need to adjust the device optically each time you use it.

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An example of a reflecting telescope with a mirror structure.

Benefits:

  • Lowest cost Every inch of aperture comes with a simple design
  • Ability to see celestial objects from the top of a telescope tube that makes it easy to use a short tripod.

Disadvantages: strong>

  • Each time you use it, you need to adjust the telescope to see the celestial bodies clearly.
  • The telescope's optical tube is prone to dust collection
  • This type of telescope is not a good choice for viewing objects on the ground.
  • For each aperture unit, the tube will be larger.

3. Compound Telescopes

As the name implies, composite or reflection telescopes use a combination of lenses and mirrors to see distant objects. These models of telescopes are compact products with relatively light weight. It should be noted that the two most popular designs in this category of products are the Schmidt-Cassegrains telescope and the Maksutov-Cassegrains.

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An example of a reflection-refraction telescope

Advantages:

  • has the most compact tube per inch of aperture
  • The presence of this short tube greatly facilitates the installation of the device.
  • The amount of height changes in the eye of this type The telescope is small, and its tube is well sealed.

Disadvantages:

  • Relatively costly Top for every inch of aperture
  • Requires periodic adjustments (aligning images of celestial bodies with the eye)
  • All models in this category have a cool, time-consuming coolness.
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    Everything you need to consider before buying a telescope

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    Adequate knowledge of the types of telescopes used for observation, it is necessary to check your needs before proceeding to purchase and buy a telescope according to those needs. Below is a checklist for a better choice that can help you in this regard.

    Paying attention to the telescope's aperture diameter

    It is the size of the diameter of a lens or mirror that collects light and is also known as an objective lens. Diaphragm diameter (D) is usually expressed in millimeters, but in some cases it is also written in inches (1 inch equals 25.4 mm). As a general rule, a suitable telescope should have a minimum aperture of 2.8 inches (70 mm).

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    The importance of the aperture in choosing a telescope

    The larger the aperture of your telescope, the dimmer objects and more visible objects will be. However, if you have the chance to live in desert areas away from light pollution, with just a small camera with an aperture of 80 mm (3.1 inches) you can see a wide range of star clusters and galaxies other than the Milky Way. See. But you'll probably need a 6- or 8-inch telescope (about 152.4mm or 203.2mm) to see the same objects and galaxies from a typical backyard backyard.

    Aperture diameter of more than 70 mm gives you more details.

    No matter how dark or light the sky above you is, seeing celestial objects from a telescope with a large aperture is more dramatic and complete than seeing the same objects from a smaller aperture.

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    Do you have?

    Remember that cheaper telescope models allow you to see objects up close and the moon. While more expensive models allow you to scan more space. If you are interested in astrophotography, choosing models with short and small tubes is a higher priority than large options.

    Suitable magnification for telescopes

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    The right magnification rate is different for each telescope, on the other hand, if you think that a telescope with a higher magnification is a good option, you have to admit that you are sorely mistaken! Because each type of telescope has its own magnification according to the focal ratio, the diameter of the telescope's aperture diameter and the quality of the construction of mirrors and lenses. The telescope aperture diameter and focal ratio greatly reduce image quality.

    But in general, it can be said that for every inch of the telescope aperture, a magnification of about 30 to 50 times is a good amount. However, a good refracting telescope can provide 100x magnification for bright objects. You can always choose telescopes with higher magnification, but if your telescope power is not so high, more magnification is practically meaningless; Because image quality is affected by a lot of distortion and vibration. Seeing different celestial bodies requires different magnifications; For this reason, many observer professions have a wide range of eye types. Typically, a set of telescope quadrilaterals measuring 6mm, 10mm, 15mm, and 25mm can cover most celestial objects. So spend as much as you can on a quality eye purchase. It is also recommended to choose multi-component glasses that use more than two lenses to buy.

    ) Is usually written on the body of the lens. In general, the amount of AFOV varies from 45 degrees to 100 degrees. Ordinary telescope eyes are about 40 to 55 degrees, wide-angle or wide-angle eyes are about 72 degrees, and very wide-angle or super-wide-angle eyes are about 80 degrees or more.

    Remember to observe, of course. The sky and seeing non-planetary objects through the eyes is wider, better and more accurate, and offers a better user experience. Therefore, depending on the amount of field of view and the amount of magnification, you can field Calculate the actual ocular vision of your telescope. In order to determine the true field of view of the telescope, it is necessary to divide the amount of the field of view by magnification.

    Pay attention to the size of the telescope according to the space of the house

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    The common assumption is that a telescope can take up a lot of space. But you should know that this does not include all models. Because there is a wide range of sizes on the market, among which compact, portable and small models are very common.

    Are you interested in carrying a telescope?

    If carrying a telescope to different places? An important criterion for your choice is to first look at a wide range of collapsible telescopes. Also be careful, choose a model that is as light as possible.

    Should I buy a telescope stand or not?

    buying or not buying a stand depends on the type of telescope you are buying. Is. In general, Dobsonian telescopes do not need to be mounted with a stand, while tube models, especially of the refractory type, require a stand for mounting, as the presence of the stand prevents the telescope from vibrating. In fact, it is interesting to note that each small shake or vibration during observation becomes so large that it overshadows the whole image. Therefore, it is especially important to purchase a suitable base for the telescope during the observation.

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    An example of a Dobsonian telescope

    Apart from discussing the choice and purchase of a base for a telescope, it is also important to consider the telescope's location. The location of the telescope is generally called its headquarters. The types of mounts mounted on a pedestal can be divided into two general categories, including altazimuth mounts and equatorial mounts.

    By choosing a tropical telescope, you can see celestial bodies Follow the motion by moving the telescope in only one direction (parallel to the latitude and longitude orbits of the globe). You can also use a tracker on the telescope to keep the target within range. It should be noted that this type of telescope is useful for professional astronomers and photographers, and to use it, you need to be well acquainted with the celestial coordinates.

    Is. So that one of the two axes is horizontal and the other is vertical. In this case, the range of motion of the telescope is from east to west and slightly up or down (altitude).

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    The Difference Between Position-Altitude and Tropical Positions

    Considering the budget for the telescope

    can be easily done with a simple search He found that the price of telescopes was very different. In general, this price range starts from 600 thousand tomans and continues up to over 20 million tomans (in 1401). So before making a purchase decision, it's a good idea to consider your needs and see if you can find the telescope you are considering, given your estimated budget!

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    The perfect telescope for observing the moon and planets

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    Since the moon, planets and the sun (never watch without a special sun filter, as it will cause irreparable damage!) They are bright enough, to get a high quality image with all the details, we have to increase the magnification of the telescope. Using a telescope with a large aperture diameter is the best option for photographing the planets, moon and sun, as these types of telescopes are more magnified and can record a lot of detail. Also, for a better view of these objects, it is best to use a telescope with a high focal length (at least 1,000 mm).

    In this regard, the Maksutov-Cassegrain telescopes are ideal products. Are recommended. Maxotov-Kasgreen telescopes do not have a wide field of view, but the contrast of the image in their center is high. Schmidt-Cassegrain telescopes are another good option with excellent optical quality; At the same time, it is easy to use.

    Telescopes suitable for deep space observation

    Observation of objects such as galaxies, star clusters and supernovae due to low light (albeit at distances of millions) They do not need to be observed with high magnification telescopes. Also, the suitable focal length for observing the depths of space is about 500 to 1000 mm, provided that the focal rate is considered fast (meaning that it is not higher than f/8!).. It is important to note that when buying a telescope for far-sighted objects, choose wide-angle binoculars.

    Focal ratios of less than f/7 are generally considered fast. And this depends on the focal length and aperture of the telescope.

    In order to photograph the celestial bodies mentioned in this section, you must use the long exposure technique. Because in general, long exposures allow you to take more detailed photos. During exposure, the subject must be properly tracked, so it is advisable (especially for newcomers to the field) to use telescopes with a not too high focal length to reduce possible errors during tracking.

    In this regard, it is recommended to use an apochromatic telescope (refractive type). The apochromatic telescope uses special lenses to correct chromatic aberration and, instead of two wavelengths, scatter three wavelengths at a time, so it has high optical quality. The lenses of apochromatic lenses are also liquid for extra scattering between the glasses.

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    Apochromatic telescope (refractive type)

    This type of product has a suitable focal ratio (usually between f/5 and f/7) and a wide field of view. Newton telescopes with a short focal length of about f/4 are also good options; Especially if it is equipped with a coma error corrector. When light enters the lens at an angle, the light rays do not focus exactly on one point after passing through the lenses; Rather, due to the inability of the lens, the image is a bit diffused. You can understand this better in the image below.

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    Light points (galaxies) are in a coma.

    Is it necessary to buy a motor for a telescope?

    Buy a separate telescope motor for astrophotographers and record moments professionally It is essential. But you should know that the operation of these motors is more than just the convenience of observing celestial objects. Slowly In such a case, the motor moves the telescope without creating unpleasant vibrations and keeps the desired celestial body in the center of the field and keeps it at its best. Therefore, the existence of a separate motor and manual controller allows you to capture high quality astronomical photos.

    The best-selling models of telescopes available in the Iranian market

    In this section, some examples of the best-selling and We review the most popular telescope models suitable for newcomers to the field, as well as semi-professionals and professionals. It should be noted that this section has been reviewed and introduced based on user satisfaction on the BingMag site.

    Model telescope CRN-1501400

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    CRN-1501400 telescope is made by Kamar company and is in the category of reflection telescopes (Newton). The diameter of the lens or mirror of the object in this product is 150 mm and its focal length is 1400 mm. The type of headquarters of this product is high altitude and its focal ratio is 9.3. Determine the ideal user for you based on the objects you observe. The maximum magnification for the CRN-1501400 is 1050x, and it can collect light up to 459X. And astrophotography is a high value purchase option. The Kamar CRN 76700 telescope is an easy-to-use product, including the Newtonian reflecting telescope, which is a great option for deep space observation.

    Maximum magnification in this telescope model , Is 525 times and its aperture range is 80 mm. This product also has a focal length of 600 to 1200 mm. This type of telescope is a well-made product with three eyepieces SR4, H12, H20 and the type of height-facing headquarters, so it can be a choice in a reasonable price range and with enough features.

    If you are new to the field, the F30070M achromatic refracting telescopeis the right choice for you. Because its specifications include easy transport, 300 mm focal length and 70 mm aperture diameter. Such features in this model of telescopemake you have a good view of the near and present celestial bodies in the solar system. In addition to these features, the F30070M has binoculars with specifications of 6 and 25 mm. It should be noted that the type of headquarters of this telescopeis an altitude direction and for observing close objects such as the moon and planets, it is a practical and, of course, completely economical product. p> BingMag.com A <b>complete</b> <b>guide</b> to <b>buying</b> the <b>best</b> <b>telescope</b> for <b>beginners</b> and professionals

    Drisco F76700 Telescope, one of the telescopes It is an amateur reflection of Drisco, which has excellent magnifying power and its high transparency allows novice observers to become better acquainted with celestial objects.

    About the specifications of this product, it can be said that its focal length is 700 Mm, the aperture of the telescope is 76 mm and the type of its base is an altitude side. In general, the price range of the Drisco F76700 telescope is not very high, and the quality of images, especially the moon and planets, is good in this product model. It is also painless to install and with the installation CD and Persian training, it makes the work easier for you.

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    Kamar telescope Model CR Ma-Be 901200

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    Kamar telescope Model CR Ma-Be 901200 is a Maxtoff-Casgreen type product with a aperture of 90 mm, maximum magnification 675 times, power Light collection up to 165X and K6, K9 and K20 triangular are among the most valuable tools for professionals and semi-professionals. The headquarters of this telescope model is of the height side type, which also makes it easy to adjust and install. Since this telescope is of the Maxtoff-Kasgreen type, it is a useful tool for observing both near and deep objects (galaxies and star clusters).

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    The Kamar CRG 70900 telescope is one of the simplest and most widely used astronomical refractive instruments for professional observers. Even a novice is a great option. It should be noted that if you intend to use this telescope to see the landscape, you must use a rectifier for it, because without such pieces of images can be seen inverted.

    Due to the same issue, CRG The 70900 has a 1.5X rectifier that will be fully functional after viewing at the end of the tube. In general, the price of this model of telescope is not very high, but its features are quite satisfactory. This type of product has a diaphragm diameter of 70 mm and next to it is equipped with three eyepieces (K20, K9 and SR4), 675x magnification and light collection power up to 100X. Kamar headquarters of model CRG 70900 is of altitude type and installation and adjustment is not very time consuming.

    18779-21.jpg ">

    If you're interested in buying a professional telescope and are not worried about the cost of this product, the Astro Master 90EQ Celestron telescope is probably for you. About the main and optical characteristics of this achromatic refracting telescope, which is 90 mm long and with a focal length of 1000 mm (focal ratio f/11), will give you a wide area of the sky.

    Astro Master 90EQ has a red light spot seeker that allows you to quickly and easily find the subject you are looking for. The eyes with this telescope are two and in the sizes of 20 mm (50 times) and 10 mm (100 times). It should be noted that the magnification of this product is 180 times and the type of headquarters is tropical. 22.jpg ">

    The Fandel telescope Code 004 is one of those very economical astronomical instruments that can help your children to get acquainted with the sky. In fact, for most semi-professionals and even novices, the fandel does not have the ability to observe very high quality and detailed, but at a glance it shows objects close to the earth, including the moon, on clear nights and away from light pollution to an acceptable level. . This telescope is an achromatic refraction type and with aperture of 30, magnification 30 times, focal length of 600 mm and two types of eyes 2.5 and 25 mm are available on the BingMag website. Fandel Code 50f600

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    Fandel Code 50f600 Telescope, a semi-professional telescope with all the necessary accessories including three Adjustable base with a height of 150 cm, which is a cost-effective option for teenagers to get acquainted with the sky. Among the specifications of this product, we can mention the focal length of 600 mm, the aperture diameter of 80 mm, the magnification of 150 times, and the type of height-facing seat. Also, this type of telescope has been marketed with 4, 6 and 12 mm binoculars, which make it possible to see celestial objects with various magnifications.

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    PowerScopes are well-known brands, both for newcomers to the field and for professionals and semi-professionals who take pictures. Provides the moon and planets with high compassion. Meanwhile, the Power Seeker Code 80 Celestron telescope is no exception to this rule, and with its easy installation and very easy portability, is a priority for many people.

    Its focal length is 900 mm Is. Also, the diaphragm diameter of this product is 80 mm, the magnification is 160 times and it comes with 3 Barlow lenses. Of course, it should be emphasized that the headquarters of this telescope is of the tropical type; So it has its own complexities to adjust. To use this model, you also need to be well acquainted with the astronomical field and the sky map to make your user experience more accurate and better.

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    Another achromatic refractive option on the BingMag site is the Zillook telescope Model 70076, which is a remarkable model despite its affordable price and features. For newcomers to the field of observation; Because the diameter of the aperture in this product is 76 mm and its magnification is 528 times. As a result, the moon, sun and planets can be seen in sufficient detail. The headquarters of this tool is of the height side type and is marketed with three eyes (35, 56 and 175 mm). The total weight of this telescope model is only 8 kg and despite such a weight, it can be easily moved.

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    Celestron telescope Model Astro Master 70 EQ

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    Celestron telescope Model Astro Master 70 EQ, a professional product with a focal length of 900 mm, aperture of 70 mm and a magnification of 165 times efficient telescopic for any type of observation It is the sky. The function of this model is achromatic refraction and with binoculars (10 and 20 mm) it is a remarkable model for examination. The focal ratio in the Astro Master 70 EQ is f/13, and its seat type is tropical, which certainly has its own set of complexities and should be considered before purchasing.

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    Summary

    A functional, high-quality telescope can literally open your eyes to a world of celestial pleasures. So to achieve such an amazing experience, with a little care in choosing the type of telescope and its aspects, you can enjoy exploring the night sky for a lifetime and even have fun all night long with your family.


Source: Sky-Watcher

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