August 16, 2022

<< 2022 >> 12 recommended astronomical telescopes. Experts carefully select popular models that are easy for beginners to handle!

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An astronomical telescope that reveals the mysteries of the universe that cannot be seen with the naked eye. There is an image that it is expensive and difficult to handle, but in recent years there are many models for beginners that can be purchased for around 50,000 yen. Also popular are those that have functions such as navigating to the celestial bodies you want to see with your smartphone. Here, we will explain how to choose an astronomical telescope in an easy-to-understand manner, and introduce 12 recommended items carefully selected by experts.
How to choose an astronomical telescope
An astronomical telescope is a combination of a “barrel” that contains lenses and reflectors, a “base” that allows the barrel to move stably, and a “tripod” that firmly supports the base. Choose the right equipment according to your purpose and budget.

A type that collects light using an objective lens (convex lens). The structure is simple, and adjustment (maintenance) of the optical axis is almost unnecessary, making it suitable for beginners. Also, in general, if there is a temperature difference between the inside air and the outside air of the lens barrel, an air current will occur in the inside air and the image will become unstable. Because of its structure, it adapts quickly to the outside air, so you don’t need to take it outside to get used to it. However, since multiple lenses are used, it tends to be heavier than other formats with the same aperture. You can also observe the sun using the solar projection plate.
A type that collects light using a reflecting mirror (concave mirror) plated on the glass surface. Regular maintenance is required because the inside is easily soiled and the optical axis shifts. Many models are more compact than refraction types, and the advantage is that even models with a large aperture are easy to obtain at a low price. However, it must be acclimatized to the ambient temperature before use.

▼Catadioptric
A type that folds the focal point with a telescope using a mirror. The advantage is that it is easy to obtain high magnification, and the lens barrel is compact and easy to handle.

2. Difference in stand type
▼Altitude platform
A type that moves in two directions, vertical and horizontal, to match the celestial object you want to see. It is suitable for beginners with a simple structure that is easy to assemble and handle. However, in order to keep track of celestial objects in diurnal motion, two-axis operation is required.

▼Equatorial mount
A type that rotates around the celestial north pole. If the direction of the equatorial mount is adjusted in advance to the vicinity of the Pole Star, it can be tracked by rotating in one direction along with the rotation of the Earth, making it suitable for high-magnification observations.
A numerical value that represents the diameter of the “objective lens” for the refractive type and the “primary objective mirror” for the reflective type. Regardless of the optical format, the larger the effective diameter, the more light can be gathered, making it easier to obtain a clear field of view. For beginners, an effective diameter of 80-130mm is recommended.

▼Magnification
It is expressed by dividing the “focal length of the objective lens” by the “focal length of the eyepiece” (e.g. objective lens 800mm ÷ eyepiece lens 20mm = 40x magnification). It will make it easier to obtain magnification, but be careful because the field of view will be blurry if it is below the minimum magnification or above the effective magnification.
▼Size and weight
It’s a common story to regret after buying it, saying, “It was bigger than I imagined.” If it is difficult to transport, you will lose the desire to use it. It is also important that the size and weight be such that you can easily take it with you and say, “Let’s take a look at the moon because it’s beautiful!”

12 recommended astronomical telescopes for beginners
Here are 12 recommended astronomical telescopes handpicked by experts.

1. Celestron “StarSense Explorer DX 102AZ” Feels
like a game! Smartphone app navigates to target celestial body
It is a refracting lens with a diameter of 102mm and a focal length of 660mm. Two eyepieces, 25mm (approximately 26x) and 10mm (approximately 66x), are included. The latitude and latitude base adopts a “free stop type” that quietly stops when the hand is released, and is also equipped with a fine movement handle. As a common specification of the “StarSense” series, by installing a smartphone that has downloaded the special application “StarSense Explorer”, it is attractive to be able to search for the target celestial object while looking at the smartphone screen.
A reflective type with a 130mm aperture and a 650mm focal length. With its large aperture and low to medium magnification, it is also suitable for astronomical observations with expanses such as the Pleiades star cluster and the Great Orion Nebula. Two eyepieces, 25mm (approximately 26x) and 10mm (approximately 66x), are included. The altazimuth mount and smartphone app specifications are the same as the 102AZ.
The aperture is 80mm, and the focal length is 900mm, making it easy for beginners to use. Comes with 2 types of eyepieces (25mm and 10mm) and a “2x barlow lens” that can extend the focal length of the objective lens, providing 4 different magnifications (approximately 36x, 72x, 90x, 180x). can be enjoyed at The altazimuth base is not a free stop type, so delicate operation is required, but the price is kept down accordingly.

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