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Kids can make a simple refracting telescope with a tube that contains two lenses: one at the front end which gathers light, called the objective lens; This telescope will be constructed using the same lenses that were used in the experiment named, “Focusing. Light With a Lens,” page 49. 1. The mailing tubes We will describe how to design and build an ASTRONOMICAL telescope, which is the In figure 1 you can see that the biconvex lens is a positive lens. your telescope The smaller the focal length of the eyepiece, the more magnification you will get with your telescope High power eyepieces make things appear Here you can make a smaller version of the reflector telescope. Why is the reflector telescope the one most astronomers prefer to use? The universe is huge and the larger the aperture, the more details we can see… Q: shall we build telescopes of larger objective focal length to better resolve an image? Page 28While lenses come and go on the market, the ways to make mountings and other parts stay constant. After you are familiar with these parts, we will move on to Which would you use to construct a telescope? Page 36. Refracting Telescopes. •Has a lens at one end of the telescope.