Barlow Lenses of a telescope

Barlow lenses were invented and developed by Peter Barlow and consequentially bear his name. The lenses are not only used in telescopes but also in microscopes to serve the purposes of medicine, science, etc. this type of optical lens is usually used in combination with other different types of optics as well as optical systems. The result of such use is a substantial increase of the focal length of the system where Barlow lenses are used. Barlow lenses are widely used in telescopes. It is a very efficient way of increasing the magnification of your tool. The lens is simply…

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Telescope aperture or Focal length?

Every telescope can be chosen on the basis of two criteria because one of the main characters that will be taken into account is either aperture or focal length. Aperture in a telescope is the objective length diameter when it is referred to a refracting telescope or the primary mirror when it is referred to reflecting telescope. So, if you switch to greater focal length, it is clearly better to observe remote objects in space such as the Moon, planets, etc. or if you require better observation of DSO (deep space objects) such as galaxies getting a device with greater aperture figures is better.

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Telescopes types: optical schemes

There are three different types of telescopes: reflector, refractor and catadioptric. Each type has its own advantages and disadvantages and suitable for different cases. This article is going to help you to understand, which is suitable for you. So, let`s see, what`s better: telescope reflecting or refracting, or catadioptric, maybe? Refracting telescopes A refractor, or a lens telescope, is the oldest type of telescopes. It was invented in 1609 by Galileo Galilei and was updated in consequence. Firstly, a refractor used two lenses: convex as an objective and concave in an eyepiece, that caused spherical and chromatic aberrations. This scheme…

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Astronomy binoculars

Hello, dear visitors! Make yourself at home, whether you at home or not. By the way, did you ever feel that your real home is not the place, where are you currently live? I did. Some of us suppose that home is not a place but is the soulmate, who we will meet someday. The others find a home in different cultures, which they feel identity with. But what if our souls are from far-far away? Far in a deep sky, where time transforms and disappears, and substance burns. Did you know that the time distance between our planet and…

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