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Observe the sky and the stars with the telescopes

Essential tools not only for those who study astronomical phenomena, but also for those who approach neophyte to this fascinating branch of science, the telescopes allow you to scan the sky, closely observing the profile of stars, galaxies and planets. The birth of this device, whose operation is based on the ability to refract the image by convex flat lenses, is due to the Dutch optician Hans Lipperhey who, putting into practice the theoretical research of Roger Bacon, built in 1608 the first refractor telescope model. The famous Italian scientist Galileo Galilei perfected the instrument the following year, who used it for his revolutionary discoveries in astronomy. From the early seventeenth century to today, the telescopes have gradually evolved, thanks to the contribution given by scientists around the world, who have made new changes to correct the phenomenon of chromatic aberration, responsible for a difficult focus of the 'image. The latest generation models, made with high quality materials and based on the application of advanced technologies, ensure high reliability from the point of view of optical performance.

Refracting telescopes and reflectors: what are the differences between the two models?

The substantial difference that exists between the refractor and the reflector telescopes is all in the instrument used to focus the image. In the first case this medium is represented by the lens, while in the second by the mirror. The refractor lens is also typically achromatic, which makes it the most suitable solution for those wishing to observe not only the sky, but also the terrestrial subjects. Of a certain usefulness in this case it can be the option present in many refractors that allows to straighten the image. The mirror system exploited by reflector telescopes is often associated with an instrument of greater diameter and better resolving capacity. Because observing astronomical objects defined in weaker jargon, such as galaxies or nebulae, requires a greater ability to collect light, large-diameter reflector telescopes are recommended for those who wish to capture spectacular images of the sky. In case you want to use the instrument for ornithological observations, it is advisable to choose models with a dazzle control system and excellent light transmittance. Other important features for a more pleasant and comfortable viewing experience are represented by a rather moderate acclimatization time by the instrument, by a satisfactory performance even at low magnification and by an anti-humidity filter that prevents lens fogging.

How to choose a telescope?

- Take into consideration the different models available: refracting telescopes offer greater guarantees in terms of image clarity, while the reflectors allow to capture even the most evanescent objects - Pay attention to the indications concerning the focal ratio of the instrument, to have a 'fuller idea of ​​the guaranteed performance and the level of brightness that can be expected from the image captured - Evaluate the presence of an adapter to take pictures with a camera if you want to print your observations on photos - Consider the weight of the instrument: the models Laptops are lighter, less bulky and suitable to be transported for observations in the middle of nature
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