![]() You can also purchase an eyepiece with focal length, between 25 and 10 mm focal length. It will allow you to grow between 90 and 150x depending on the focal length. ![]() At least one long-eyed eyepiece for viewing large star fields (eyepieces with 32, 40 or 50 mm focal length) and a short focal eyepiece between 8 and 6 mm. These instruments are also quite large (2 meters) and heavy (more than 30 kg) and are more suitable for adults.įinally, you need eyepieces to achieve magnification and enlarge the image formed by the lens. These larger diameter models are also much more expensive and are more bulky than entry-level models because they are often of better quality, equipped with accessories -especially for astrophotography- and a guidance system automatic. However, I advise you to wait a few years before investing in a telescope of more than 100 mm diameter or in a telescope of 200 mm and more, just to see if in 5 or 10 years you are still passionate about astronomy. For a sometimes lower price you can also buy a small Dobsonian (it looks like Newton’s telescope) from 150 to 200 mm in diameter. If you are older you can buy a Newton telescope from 110 to 150 mm in diameter equipped with an equatorial mount. It already allows to observe the Moon, the stars and the main planets. If you are under 12, a 60 to 80 mm diameter bezel is a good buy. Should you buy a telescope or a telescope? The two instruments are equivalent but fans usually choose a telescope because beyond 100 mm in diameter, an astronomical telescope is very expensive, sometimes 5 times the price of a telescope with the same diameter!
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