Lens mildew is mainly caused by moisture on the lens, so to prevent mildew on th...
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In fact, the type of telescope lens is related to the material of the lens and t...
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Is the higher the better? Most people intuitively believe that the higher the te...
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Since people's discovery and understanding of the properties of light is a proce...
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Which multiple is more suitable? Generally speaking, hand-held binoculars at 7-1...
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The world's largest single-aperture 500-meter spherical radio telescope (FAST) p...
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Due to variable factors, the term "field of view" usually has two meanings, and ...
VIEW DETAILS >Some properties of eyepieces are very important to the function of optical produ...
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