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I want to buy an entry-level astronomical telescope. The first one is the tube wave 60/700. At present, the price is only in 400 yuan, which can basically meet the needs of beginners. But the telescope didn't say "how far to look", only the resolution and the limit magnitude. Generally 60/700 depends on the profit and loss of Venus, the polar cap of Mars, the nebula belt, Saturn's rings, Uranus and Neptune. Theoretically, you can also see all 1 10 deep space objects in messier (beginners probably 10).
This focal ratio is moderate, and you can see both distant and near celestial bodies. There are enough junior observers, so there should be no need to change them. If you have a certain stargazing foundation after a while, you can buy a better one.
After a certain accumulation, it is recommended to use an aperture of more than 80mm, because the aperture is the most important parameter for the observation effect of absolute telescope. Sirius, Daguan, Guanbo and Xingtelang are all reliable brands. (However, the online ordering of Starling may be fake. )
Astronomical telescopes have high requirements on the environment, and the aperture of 100mm is equivalent to 40 mm to 50 mm in the suburbs at most.
Supplement:
Qingdao observatory must have it, but don't go to the store if you don't want it to be too expensive. This price is too expensive, especially for the observatory. This price is even more frightening, at least twice as much as online. If the landlord really wants to buy an astronomical telescope, he still has to find a group purchase online, which is far from the price in the store.
Except for a few domestic brands of astronomical telescopes, such as Phoenix and Panda, they are basically deceptive, and many of them are achromatic. So if you want to buy, I still recommend those brands. In addition, except for Startron, which is a little more expensive, other brand entry-level products are very cheap, and 60/700 mirrors are generally below 500 yuan. If you buy it directly, the seller will blow it for about 5 minutes at most, and you don't have to go to a franchise store. The caliber of 70mm will dare to enlarge you by 400 times. Online parameters are relatively transparent, and 60/700 or 60/600 can be considered.
The telescope didn't say how far to look, only the resolution and the limit magnitude, and these two parameters are determined by the aperture, so the aperture is the most important. Secondly, the focal length is too short to be suitable for astronomical observation. Pay attention to these two points, and you can basically pick the mirror that suits you.