One day in the early 17th century, Hans Lippershey, the owner of an optical shop...
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1. Specifications: For example, 8×30 means that the optical power of the lens is...
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Almost all mobile phones nowadays have camera functions. Most of the friends who...
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Six factors affecting telescope performance Owning a telescope with excellent pe...
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A convex lens is a lens with a thicker central part. Convex lenses are divided i...
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There is no specific international standard for this, because the telescope is s...
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1. Image quality Workmanship and materials: High-quality imaging requires high-q...
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The telescope is the bridge between us and the starry sky and the universe. Thro...
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