At high magnification (25× to 50× per inch of aperture, or 1× to 2× per mm of aperture) and in good seeing conditions, stars at focus should appear in the eyepiece as tight, symmetric diffraction disks. Make sure the larger diameter one also has larger magnification power. Making a refractory telescope Illustration from Emblemata of Zinne-werck, Johan de Brune, 1624. They detect far away objects using electromagnetic radiation such as radio waves, microwaves, infra-red and visible light. It is inexpensive, reasonably portable, gives good performance on planets, the moon and deep sky objects and is simple. They used it at sea to check the flags of distant boats approaching and to decide if they were friends or enemies. Once your reflector telescope has cooled down and is well-collimated, it should be ready to perform at its best. Most anyone who wants a telescope can own a telescope like this. The telescope was discovered by the Dutch, a nation of sailors and sea explorers. I used a meter of 3" diameter pvc and a half meter of 2" pvc (I think). This page provides detailed plans and instructions how to build one. Step 4: Set up the Reflector Telescope Plans for a Dobsonian telescope Plans for a homemade Dobsonian telescope Since you are reading this, you are probably considering to build your own Dobsonian telescope. You can buy some ready made parts, or you can make everything on your own, including the mirrors and eyepieces. • Refracting telescopes use lenses to magnify the far away images. It is a telescope for the people. Thats OK - all astronomical telescopes operate this way as it doesn't matter in space. For reflector telescopes, the perfect location is a dark and open clearing with no high trees or buildings to obstruct your view. This six inch reflector is very close to "the perfect telescope" in many ways. 2. okay so i am attaching pdf file of reference book i used to make the scope.don't think this is a normal telescope guide you get from internet .this is so far the best telescope making guide you can get in market.i give all the credit of the book to Edmund scientific co.,and mr.Sam brown for writing this book. Optical telescopes detect visible light and come in two main types. Two lengths of PVC pipe. Step 6 Whoops - the image is upside down and back to front! The darker it is the better since any ambient or outdoor light can make viewing difficult. Start by looking at the moon since it’s usually the brightest object. Step 5 Gradually turn the focussing knob until your object comes into sharp focus. The eyepiece angle can be adjusted on a reflector telescope by rotating the optical tube in the tube rings after unfastening the tube ring clamping screws. 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