Buy an astronomical telescope, more than 500 times, good quality, which one to choose?

As said upstairs, the multiple is actually the focal length of the telescope objective divided by the focal length of the eyepiece.

For example, the focal length of the mirror objective is 1000. If you want to reach more than 500 times, 1000 divided by 2 equals 500, then you need a 2MM eyepiece.

So strictly speaking, as long as it is a mirror, it can reach more than 500 times-(provided that you can find such a small eyepiece)

A very important issue here is the higher the magnification. The lower the brightness, the more than 500 times the average mirror size with an ultra-small eyepiece. It is estimated that nothing can be seen in the dark, = =

The problem of aperture is coming. The larger the aperture of the telescope objective. The stronger the light collection ability, so if you want to see something more than 500 times, you naturally need a large-caliber telescope.

Considering various factors, it is now recognized that the maximum achievable multiple of a telescope is twice the aperture of the telescope objective. So if you need a multiple of more than 500 times, then you need a 250-caliber telescope. Of course, if the brightness or clarity is not so high, it can be lowered by tens of millimeters.

I recommend mirrors for telescopes over 200 caliber. Because in a telescope, the same price is generally a large mirror aperture. Moreover, if you get a refractor over 200, it's almost like a gun. = =

As for which one to choose, I think no matter which one to choose, it is a task of burning money, and the image observed by such a large-caliber mirror will shake badly, and it will definitely be particularly angry when observing. Think about it. For example, it is obviously different for a person to move one millimeter from 100 meters, and then move one millimeter after pulling him several times closer. Besides, a mirror with such a large aperture is of little use in astronomical observation if it is not photographed in deep space. If you do deep space photography, the money will be beyond the affordability of ordinary people.

If you really want a mirror with a magnification of about 500 times and good quality, I can only recommend two models.

One is C8 of Startron, and the other is C 14. The maximum multiple of C8 is about 408 times. The maximum multiple of C 14 is about 470 times. If it can be broken to 500 times, it should have no effect on the image. As for the quotation, the quotation of C8 is about 15000, and as for C 14. The price is between 40,000 and 50,000.

Of course, if you use this kind of mirror. They are quite heavy, so we need a tripod with qualified quality and an equatorial plane with ultra-high precision and excellent quality. If you buy genuine products, the original equatorial telescope will not have much problem. However, I think it is necessary to replace the tripod. It is estimated that the carbon tripod is the only tripod comparable to C8/C 14, and it is also very expensive. Tripod is a very important part. A tripod with a mirror is generally about half the price of a mirror.

In this case, if you choose C8, the whole set will be 20000+. C 14 is about 70000. As for what I said earlier, "If you don't take deep space photography, taking this kind of mirror is actually a chicken rib." Correspondingly, add the price of photographic equipment and so on. I can't afford it anyway.

Now, let's go back to the question that there is no need to buy such a large-caliber mirror.

In fact, the function of this large-caliber mirror is similar to that of 70~ 100 caliber mirror. What can a 200+ caliber mirror see? The sun and various planets. Not all planets. The solar system can only hit Uranus as far as possible, which is still super underestimated, so strictly speaking, Saturn is similar. Neptune's words are probably invisible, so an 80-caliber mirror can also see the sun and various planets. The farthest Saturn.

So I think the difference between a 200+ caliber mirror and an 80+ caliber mirror is almost that Jupiter is a half coin at 200+ and a bean at 80+. The details are actually similar. Saturn and Jupiter are the most beautiful in the solar system. Both of them are 80 caliber.

Ah. In addition, from another point of view, 80 caliber is better than 200+. Because we can observe celestial bodies except those in deep space (visually black and white), we usually observe them by photography. This is the deep space photography mentioned just now. It's an inner planet. As mentioned earlier, the larger the aperture, the stronger the collected light. At this point, except for veterans. With a caliber of 200+, most people can't see the planets on the earth. Because when we look at the planets on the earth (Mercury and Venus), the planets on the earth are very close to the sun. If the telescope collects too much light, it will do harm to the eyes. In addition, the large aperture mirror is so shaken that it may be even bright and blind if you are not careful. When we were young, didn't we play with a magnifying glass and focus on the sun to burn paper? The principle is the same as this, and a mirror with such a large aperture and such a high multiple can't be compared with a magnifying glass, so I think if you start with such a 200+ mirror, you won't see more than a mirror with a small aperture. On the contrary, it's still gone. You said it was a lie.

All right. Having said that, it's still a pure hand fight. I mainly hope you can understand the reason, and I hope my words are not in vain. You don't like large-caliber mirrors so much anymore. Then I began to introduce some mirrors that are not bad in all aspects. These mirrors are easy to carry and can be moved to the suburbs when there are important astronomical phenomena, otherwise the city light pollution is so serious. Wouldn't it be a pity to miss the important astronomical phenomena?

I recommend EQ2 Skywatcher 70/900. The function of this mirror is enough. There is also a lot of room for equipment upgrade. If you play deeply in the future, you can also be a star guide with satisfactory quality. This kind of mirror has a 25mm and12.5mm eyepiece and a 90-degree zenith mirror (the zenith mirror is used to change the direction of light). If you don't have a zenith mirror to observe the celestial bodies near the zenith, you can only lie on the ground. As for its equatorial telescope, that's Germany's EQ2. Can meet the general observation, tripod, if your requirements are not so high, its original aluminum frame can still be used. There will be jitter. But the jitter time is not long. The maximum magnification of this mirror after using the original eyepiece is 72 times. You can buy a small eyepiece or use Barrow mirror (magnifying glass) to reach its maximum multiple 140 times. If you break through, the chart around 170 should still be ok.

There is also a model, Star Trane 80EQ, which is very popular. I have never used this mirror before. However, there are many comments on the Internet that this mirror is a good entrance. The configuration is also relatively complete. With 20mm and 4mm eyepieces. There is also a mirror with a magnification of 3 times. Caliber 80, maximum 160 times. Breaking through to 200 times is not a big problem. As for its equatorial plane and tripod, the problem is not big.

The 70/900EQ2 of these two mirrors is about 1300. 80EQ 1500 or so,

Ah, finally finished!