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Barlow Lenses of a telescope

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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?

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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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Telescope mounts types

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There are several telescope mount tripods that can be purchased today. Every type serves specific needs and purposes and suited for certain individuals depended on their level and ability to use the tool. All of telescope mount tripods differ in price and have different features. There are four major types of mounts that can be found on the market today. Each mount has its specific name, so that will be much easier to distinguish them among each other. The range of these types can be defined as follows: Alt-Azimuth Equatorial Mount Dobsonian Mount (which is named after Mr. John Dobson)…

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Binoculars for birdwatching

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Over the years, people have always adored to get closer to observation of the wildlife and watching birds’ behavior, their habits and actions captivated the minds of the observers. Indeed, obtaining better focus as well as getting closer to the creatures often allows getting much better material for case studies and purely pleasurable moments for watching the wildlife. To do that it is very important to choose the right binocular that will serve you as an impeccable tool. You should choose accordingly on the basis of personal preferences in terms of tool’s lens sizes, waterproofing, magnification and design of the…

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Binocular KOMZ Baigish 50×50: is a china copy?

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I met this little friend on one trip; he was attached free to my hotel room. His name is Baigish 50×50 and he is Russian. He was created on the manufactory called KOMZ – an optical-mechanical factory in Kazan, which has been existed since the time of the Soviet Union. KOMZ Baigish 50×50: a short review Well, it seems that a true increase in the binocular is only 15x, not 50x, as it signed. At least, I can find just a model 15×50 on the official site. (Truly, I could not find this model on the official site, so I…

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Ski walkie-talkie: how to choose the best

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When you go to the mountains, it’s not the best idea to choose the cellphone for connection to your friends. Cellular coverage in the mountains is fragmentary and you risk to stay without communication. Remember that it may be very dangerous in the mountains to stay without connection. It’s not necessary if you go to the popular skiing slope, but what if there is nobody around, and you need help? Sometimes it may be a question of your health or even life. So, this article is about how to choose the best two-way radio for skiing in the mountains. How…

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Moon rises. It`s stargazing time!

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Moon is the best object for beginner observers and not only for them. Its close location to the Earth allows stargazers to use not too expensive telescopes and even binoculars. Moreover, you can see the biggest sights with the naked eye. Therefore, can you imagine that having a powerful telescope, you can see the famous base of astronauts and traces of their rovers on the Moon’s surface? The Moon viewing can open to you many surprising and even strange things, like these: (here will be the photos) Lunar phases A month of the Moon continues 29 days. This time is…

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Telescopes types: optical schemes

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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

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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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Binoculars with night vision

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How does night vision binoculars work? Usually, people use night vision devices for hunting, terrain orientation, for watching night animals and so one. In other words, they use it in outdoor. There must be the moonlight or light of stars. The principle of night vision devices work is the increase of rushlight, which is not enough for our eyes. Any night vision binocular does not work in absolute darkness without special assistance. If you stay in a closed room without windows or any least sources of light, your night vision device won’t help you if only it uses infrared light.…

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