Nanjing Intane Optical Engineering Co., Ltd.
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| How to buy a desirable telescope? |
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At present, the domestic market for sale a wide range of apochromatic telescope , confusing. However, in general can be classified in the following aspects: According to different origins to divide, there is abroad (Japan, United States, Germany, etc.), domestic (Guangdong, Zhejiang, Sichuan, etc.); by dividing the different brands, there is Sin Li-fu, Baolong, Tak Bo, cherry blossoms, is willing to high, the Golden Triangle and so on, according to the different purposes are classified by a change in a multiple mirror, waterproof mirror, night-vision goggles; according to the different magnification to divide, there is a low multiple (2-5 times more common in toy products), in multiple (7-10 times), and high-times (15-70 times). People buy the apochromatic telescope, the common number of digits on their list, then these figures show what technical parameters do? The next interview give an example to elaborate here. For example, those with 10 × 50mm5 °, it means that the magnification of 10 times, objective lens diameter of 50 mm, field of vision of 5 degrees (ie, the width of the 1000 horizon 87.4 m). Some people may think that the technical parameters of the number the bigger the better, does not. The magnification and field of view width is inversely proportional, that is, the greater the magnification, the smaller the width of vision, which is not conducive to search. The amount of light into the objective lens diameter and more time in low light greater ability to differentiate, but this will inevitably lead to the increase in the size of the telescope is not conducive to carry. After say this, you xing XU at a loss, but as long as learn from each other can also buy a desirable telescope. Here I would like to give you a few suggestions for you as a reference in choosing the achromatic Lens: first, such as the thought of the sea or beach tourism, please do not forget to buy a waterproof binoculars (in particular, produced in the United States to carry ö Double offshore series 7 × 50mm waterproof binoculars). Second, if we want to go sightseeing, can purchase a small telescope with zoom function. Third, where the intention is to those who "can not be near Lex and explore the" hunting of the danger zone, it should purchase a high-expansion of the telescopes. Fourth, as should be hunting or prolonged travel abroad, it is best to purchase a variable multiple of achromatic Lens, now explain its use. Because changes in multiples of multiples of the telescope can be gradually transferred from low-and high-times, so should be used with low-multiple of the first large field of vision a cursory search, and then re-use and high-times, the small field of vision to conduct detailed observations. From: http://intane.blogtownhall.com/ |
