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Apochromatic refractor by Wendy zong
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Apochromatic refractor |
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Many years ago I still remember the first time observation of celestial bodies through the apochromatic refractorapochromatic refractor case, it is to attend a Star Party, I wander back and forth at the scene until it approached an apochromatic refractorapochromatic refractor front, the mirror of the Saturn I stopped, I was shocked, it was a Words can not express the feelings of the mirror Saturn look more real, can reach a kind of feeling. Indeed, large Newtonian reflector can gather more light, Shi card is more portable, but I been a clear and thorough apochromatic refractorapochromatic refractor lens inside the imaging deeply attracted. Refractor is the use of objective lens to focus light gathered near the lens at the same time also play the role of the prism to disperse white light into monochromatic light. The typical pattern is that the focus off the blue light than red light in the optical axis from the lens closer to some, this is called chromatic aberration, these monochromatic different focus led to the telescope in a false color image, that is, we often see, the bright stars around the blue or purple halo.
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