5 things to_consider_when_buying_a_spotting_scope

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Published on March 11, 2014

Author: chenyee101

Source: slideshare.net

5 Things to Consider When Buying a Spotting Scope A spotting scope is a must-have piece of equipment for activities like long-distance nature study and bird watching, surveillance, beginner's astronomy, scenic observing and telephotography. Similar to binoculars, it is crucial to consider the different design and optical standards. Scopes are perfect for viewing distant objects like birds that cannot be admired as well with a standard pair of binoculars. Binoculars are more effective for close-up situations. Astronomy telescopes give the most powerful option, but these are rarely a practical option for on-the-go sightseeing. Below are several points to consider when it comes to searching for the most practical spotting scope: Magnification A compact telescope like the spotting scope is designed to offer terrestrial viewing. They work in situations requiring more powerful magnification settings compared to a regular pair of binoculars. Spotting scopes often include a magnification range in the region of x 25 to x 250. Most scopes are equipped with a single zoom eyepiece or interchangeable fixed eyepiece. When searching for a far off object, start with a low magnification setting (x 25) and increase to a high setting once the object is spotted. Most include a 60 mm objective lens to make sure

enough light is gathered. Glass quality High-end spotting scopes includes lenses manufactured with extra-low dispersion (ED) or high density (HD) glass. A significant different is noticed with image clarity and brightness when comparing the top spotting scope lenses to those using standard glass. This difference in quality is more noticeable at high power settings with low-light viewing conditions. Light-gathering capacity A large objective lens is designed to gather extra light and able to provide the brighter image of objects in the distance. An issue with the large lens attached to the scope is the weight. It certainly helps to consider the weight prior to buying a scope, especially if you will be traveling a lot on foot. Focus options A spotting scope comes with a choice of two focusing styles. A regular turning knob is slow but gives a high level of accuracy, while a grip control on the barrel is appreciated for its ability to offer rapid focus control. Tripod A tripod gives a high level of stability in outdoor situations. A serious spotter is certain to benefit if planning on observing at the same spot for long periods of time. A high-quality tripod includes minimal leg adjustments, comes at mid-weight, and offers a flip-lock mount system. Get a lot more information on the most-effective spotting scope and night vision goggles for all types of long-distance and nighttime viewing. Article Source: http://ezinearticles.com/?5-Things-to-Consider-When-Buying-a-Spotting-Scope&id=8329346 Astronomical Telescope - For What Purpose It Is Used For? When it comes to choosing the right astronomical telescope, you should first consider your requirements. You must find out the reason why you want to have a telescope. In other words, you must know your needs of having such device. Hence, it is recommended that you must go through deeply all the visible as well as hidden aspects of this device. Here, in this article, we'll try to explain some tips and ideas on how to

choose right one for your needs. There are mainly two parameters that should be kept in view while looking for a device i.e. aperture and focal length. Here, aperture means the diameter of mirror or lens, and focal length means the distance from a particular objective mirror or lens to point or where a particular image is created. Thus, with some simple calculation, you will be able to find out right one for your requirements. What is Telescope Aperture? A telescope aperture can be described as a physical or visible size of a particular telescope. It means that the bigger the aperture is the more light collecting ability a particular telescope has. Take for instance, a suggested aperture for a first telescope need to be minimum 100mm especially for refracting device, or about 150mm for a reflecting device or telescope. If you analyze these figures, you will know the importance of the aperture. It is a scientific truth that the pupil of our eye can reach about 8mm in diameter especially when completely adapted to a dark location. So, it's simply equivalent to an area of around 50 square mm. This is the main reason that a refracting telescope normally has an aperture of about 100mm in diameter, and thus covers an area of about 7850mm2. It means that a telescope with 100 mm aperture is simply capable of capturing 7850/50 = 157 x light. It is then available via the eyepiece of a particular telescope. Therefore, it means that if you look through a particular telescope, it will let you to discover objects about 157 times larger than actual size. If you follow the same calculation, you will notice that a 150mm aperture telescope can help you to see objects that are 353 times larger than would be seen with your unaided eye. In all, if you want to avail the maximum benefit of a particular astronomical telescope, you need to select maximum size of aperture. This will certainly help you accomplishing a desired task. What is Magnification and Focal length? Now, have a look at what are magnification and focal length? A focal length represents the physical length of a particular telescope or it may represent its optical arrangement. It means that a small-sized focal length can provide you a view of wide field such as vision of night sky. On the other hand a long focal length can offer you a very narrow field of vision or view, but with the objects displaying relatively larger than original size. Now, come to magnification of a particular telescope. It is actually a combination of telescope, telescope eyepiece and focal length. Needless to say that a telescope of a particular focal length can offer a picture of a particular size that could be fixed and won't be vary. Moreover, the eyepiece is used just like a microscope to view desired images. It means that if you change the eyepiece, the magnification of a particular

astronomical telescope will also be changed. An astronomical telescope is used to measure distance between objects in the universe with the helps of electromagnetic radiations and laser rangefinder. In this article, David Martin highlights the importance of these types of equipments in observing objects far from our reach. Leave your feedback below to let us know your experience. Article Source: http://ezinearticles.com/?Astronomical-Telescope---For-What-Purpose-It-Is-Used-For?&id=8328881 Attractive Optical Projects at Quality Prices Among all the optical instruments Astronomical telescopes and binoculars have been the most common ones. Previously these instruments were available for few people but now with new manufacturers coming up these products can be availed by general public too. One of the companies that have been providing some quality optical instruments like night vision binoculars and telescopes for kids is DCHcoast. The telescopes for kids prove to be an educational tool too and at the same time they act as a nice playing instrument for them. Other than the astronomical instrument and binoculars people can also try out the laser ragefinder, monocular, spotting scope, night vision goggle, laser diode and module. These are some of the most used optical instruments and it also depends on the requirements of the person buying it. While buying these instruments it is very important for the person to be aware of the requirements and buy them according to the needs. Binocular is one of those device that cannot be bought just on impulse, it is very important to do home work and contemplate to buy the correct one. There are different aspects that back the decision to buy the perfect pair of binoculars. If people want to buy a binocular because they just want to have one then it is recommended that they get the pairs that cost less. If the instrument is going to be used occasionally or used during a journey then people should buy ones that are cost effective and can be stored well. If the person buying the buying the binocular is a regular traveller and likes to use it during trips then they can opt for the ones that cost a little more and would help in getting nice view of the scenes visited during trips. Since these products are very sophisticated items one must make sure that they buy them from professional companies that have the experience of manufacturing them. The size of the binocular is also important and when one wants to use them for professional purpose then it is important to consider the visibility, rand range and size of the binocular. A well appointed binocular that comes with exclusive features is known to be the perfect for bird hunters. The compact binoculars are known to be good for the travellers and people involved in sports. Laser Rangefinder is an optical instrument that is helpful for capturing exact view and is mostly used by golfers.

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