If you pay a little attention, you will find that props—astronomical telescopes—are frequently appearing in TV dramas or movies in recent years.

The first thing to emphasize is that astronomical telescopes have a strong ability to gather light. If children use it to aim at the sun or other strong light sources inadvertently, it will cause irreversible damage to eyesight, so it must be used under the protection of parents.

If the parameters of mobile phones are memory, screen size, resolution, etc., some beginners will think that the astronomical telescope is of course how far they can see. In fact, "far" is not the only evaluation index.

The most important thing is to see the details of celestial bodies. There are four main parameters of astronomical telescopes:

-Aperture
-Focal Length
- Magnification
-Computer Control

Simply put, the larger the aperture, the fainter the celestial body can be seen, and the more details can be resolved, and the larger the aperture, the more expensive it is.

The magnification of the telescope is related to the focal length. It is best to have a moderate magnification. If the magnification is too large, the details cannot be seen clearly.

For example, 70400/70300/70360 parameter astronomical telescope: