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Anonymous users2024-02-071. Model selection.
There are many criteria for model selection, including aperture, focal length, focal ratio, magnification, coating, finderscope, equatorial mount and other parameters. The various parameters are dazzling, for beginners, don't be afraid, we can grasp the main contradictions: one is the focal length, and the other is the caliber.
The model of the astronomical telescope is named after these 2 parameters, general: focal length Aperture: such as 114;Caliber focal length 1000 etc.
That is, the larger the focal length and caliber, the better the more expensive, in other words, the thicker and longer the barrel, the better and more expensive.
2. Magnification.
The magnification of an astronomical telescope mainly looks at two focal lengths, namely the objective focal length and the eyepiece focal length. A Tianwang, the focal length of the objective lens is unchanged, but the focal length of the eyepiece can be flexibly combined. The formula is:
Objective focal length Eyepiece focal length = multiple. Wherein: objective focal length eyepiece focal length * several times Barov multiple = maximum multiple.
3. Brand. <>
4. American Doctor Energy Astronomical Telescope: about 4000 10000 yuan, powerful, suitable for astronomical enthusiasts.
5. Sirius Astronomical Telescope: about 1000 yuan, **cheap, suitable for beginners in astronomy.
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Anonymous users2024-02-06Generally, it takes 1000-2000 to buy a telescope from the past. In addition, astronomical telescopes are demanding on the environment in which they are used. It is necessary for the human eye to adapt to the darkness for more than 1 hour in the absence of lights, moonlight, sunny weather and no wind in order to maximize the function of the telescope.
Otherwise, you can only see the most basic celestial phenomena such as the Moon's ringed mountains, sunspots, Venus's waxing and waning, Jupiter's four Galilean moons, and Saturn's rings. Don't be fooled by the extreme magnitude of the telescope's design, it is generally difficult to exert the telescope's function to the ultimate magnitude. Telescopes are generally divided into two types: refraction and reflection, and I personally feel that the reflection type is better than the refraction type, but it is more expensive.
The biggest advantage of reflective compared to refractive is that there is no chromatic aberration. Because visible light is composed of different wavelengths of light, different colors of light will converge in different positions due to different refractive indices after refraction, which is chromatic aberration, but the reflective type does not have this disadvantage, because all light obeys the same law of reflection. However, there are coma and spherical aberration in the reflective type, and the edges of the mirror image will be distorted.
In addition, the astronomical telescope has some ancillary facilities, such as equatorial mounts, finderscopes, filters, photographic interfaces, extenders, and so on.
Among the domestic mirrors, Boguan, Daguan, and Tianluo have a good reputation.
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Anonymous users2024-02-051. The refracting astronomical telescope is more convenient to use, with a larger field of view and bright star images, but there is chromatic aberration, which reduces the resolution. The objective lens of a high-quality refractor is either a two-element double-split achromatic objective or a three-element apochromatic objective. However, achromatic or apochromatic does not completely eliminate chromatic aberration.
2. The advantage of the mirror astronomical telescope is that there is no chromatic aberration, but the coma and astigmatism of the mirror are large, which makes the image quality at the edge of the field of view worse. There are two types of mirrors commonly used: Newtonian and Cassegrain. The optical system of the former is simple and cheap, with a spherical mirror at the rear end and an eyepiece on the front side; The main and secondary mirrors of the latter optical system are aspherical, and the primary mirror and eyepiece are in the back, and the imaging quality is better and more expensive.
3. From the point of view of appearance. The refracting telescope tube is very long and inconvenient to carry, while the reflective telescope tube is shorter, which is convenient when traveling and observing.
Hello Beginners mostly choose refraction and maca reflection is not recommended to use Sky Wolf Sailing, Xingtron 80eq, Boguan 80, Boguan Marca, Xinda 80, Xinda Marca are all great Beginners are very practical! I've been playing with equipment for a long time, and it's been one step at a time, and my first astronomical telescope was the Changge of the Celestial Wolf.
First of all, you have to know what you want to see, the planet Deep Space Hoshino? >>>More
Summary. Hello! When choosing a good astronomical telescope, there are several factors to consider: >>>More
Beijing Galaxy Telescope Answer:
The gap between astronomical telescopes is very large, and our ordinary junior astronomy enthusiasts can choose non-professional mirrors (professional mirrors are very expensive, and they are generally used for professional observation). **In the 1000-2000 yuan or so low-end astronomical telescope can be, of course, if you are very passionate about astronomy, for the observation effect of high requirements, you must choose the high-end telescope, refraction and reflection have their own advantages and disadvantages, mainly depending on what you want to observe, choose the best one for yourself; >>>More
Amateur astronomers generally control the multiples of mirrors within 200 times, and less than 100 times to see the moon. The landlord said that 500 times is too general, can you be specific. Almost 70 times you can see Jupiter's extreme moons, Saturn's rings.