How to use that kind of ordinary astronomical telescope

First of all, to clarify, astronomical telescopes can never only "see the universe", they can see anything, as long as the target is far enough away (ordinary astronomical telescopes cannot focus on targets within tens of meters).

All you see is white, which means that the light path is clear, but it is not aimed at the target and the focus is not adjusted. In general, if you don't have experience with a telescope, it's most convenient to learn focusing with a distant building first. That is, aim the telescope at a building tens to hundreds of meters away, find an eyepiece with the longest focal length (generally telescopes will be equipped with telephoto eyepieces such as 40mm and 25mm) and install it in the eyepiece port of the zenith lens and tighten the fixing top wire, and then observe the imaging in the eyepiece while rotating the focusing handwheel on the focusing seat until the imaging is clear.

Then use a different eyepiece to experience the focusing and magnification effect, and you can basically learn to use the telescope.

One thing to note is that astronomical telescopes below 1000 yuan are basically toys, among which the Barrow mirror (extender) and double image mirror should not be used as much as possible, and the effect is very poor. Don't use the sun filter on the eyepiece end to observe the sun, it's very dangerous.

Find a telescope shop with expertise that will guide you on how to make astronomical observations with a telescope for a long time. After-sales service is important, especially for newbies. The most common astronomical telescope is 60 700, which can see the lunar craters, Jupiter, Saturn...

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1. Do not use the telescope directly **sun,**the sun must pass the projection method or have special filtering measures;

2 Don't treat telescopes as toys, telescopes are precision optical instruments that should be used and maintained carefully.

3 Don't think that you can see everything with a telescope, you can indeed see the details of celestial bodies and celestial bodies that cannot be distinguished by the naked eye through a telescope, but the better the effect, the higher the one, there is no perfect telescope, the most important thing is to choose the one that suits you;

4 For every telescope, there is a suitable magnification. Exceeding this multiple does not enhance the ability to distinguish, but rather makes the object very dark and difficult to see. 60 80 caliber telescope, the appropriate magnification should be less than 100 times, 200 times magnification can not see anything.

5 If you can't identify more than five constellations in the night sky, don't rush to use a telescope, because you can't find observable stars, you can only look at the moon;

6 Astronomical telescopes can also often be used for landscapes or flora and fauna, and can easily obtain higher magnifications than binoculars. However, the magnification should be less than 100 times, and 20-50 times is the most appropriate.

The usage of astronomical telescopes is as follows:

1. Adjust the optical axis of the primary mirror and the finderscope to be parallel

After installing the telescope, you first need to choose a relatively large building as the observation target, such as a chimney, an outdoor unit of an air conditioner, etc. First, select the eyepiece with the maximum f-number equipped with the telescope and attach it to the primary mirror (usually 20mm or 8mm), and use the primary lens to slowly find the object you are looking at. The focal length adjustment system makes the image clearer and puts the image in the center of the primary mirror's field of view, and when it is found, lock the tripod completely.

2. Adjust the finderscope:

The primary mirror has set the image, and now it's time to adjust the finderscope. Turn the three screws on the finderscope and slowly adjust the image in the center of the main mirror to the center of the crosswire of the finderscope as much as possible.

3. The purpose of the above two links is to make the optical axis of the two lens barrels parallel, rather than to observe a certain body, which must be understood.

4. When the optical axes of the two mirrors are parallel, all objects can be observed. Release the locked tripod and slowly move to the approximate position of the object.

Astronomical telescopes are divided into two categories: refracting telescopes and reflecting telescopes. They have their own characteristics and should be used flexibly. The usage and steps are as follows:

Adjust the optical axis of the guide mirror (an accessory that determines the field of view of the target in order to capture the target object) and the optical axis of the telescope so that they are parallel. (Due to the high magnification of the telescope and the narrow field of view, in order to capture the target object, it is necessary to have a guide mirror with a wide field of view.) Find a potato banquet vista during the day, and first adjust the optical axis of the guide mirror and the telephoto brother Jingjing mirror to parallel).

Adjust the bracket platform to keep it level (adjust the length of the three legs).Adjust the polar axis of the telescope so that it points to the celestial north pole (only with an equatorial mount, this adjustment is done when shooting** or long-term tracking).Attach the eyepiece.

Magnification = objective focal length eyepiece focal length. The magnification should be within 10 times of the diameter (cm). Peek into the guide so that the star being observed is at the intersection of the reticles.

Adjust the tube to focus (it is advisable to adjust the tube to see a clear image of the star.) If the optical axis is corrected when it is like skewed).