Externally, the parts of a refracting telescope include the eyepiece, finderscope, optical tube, aperture, focuser and mount. The eyepiece is just the case for the eyepiece lens. The finderscope is a less powerful telescope that helps you point the equipment in the right direction.Click to see full answer. Herein, what are the main components of a telescope? The following are the important parts of the telescope with their functions: The Lens. As the basis for the telescope main view, the lens is among the most important parts of the telescope. Telescope Tube. The telescope tube has the main mirror. Finderscope. Eyepiece. Mounting. Tripod. Half Pillar. Furthermore, how does a telescope work? A telescope is a tool that astronomers use to see faraway objects. Most telescopes, and all large telescopes, work by using curved mirrors to gather and focus light from the night sky. The bigger the mirrors or lenses, the more light the telescope can gather. Light is then concentrated by the shape of the optics. Considering this, what are the parts of a reflecting telescope? The Parts of a Reflector Telescope 1- The Tube assembly: This is the long white part and it holds the mirror, the secondary mirror, the eyepiece and holder. It is the whole optic system. 2- The Mount assembly: This is the whole assembly that supports and moves the telescope tube.What is the importance of telescope?Telescope, device used to form magnified images of distant objects. The telescope is undoubtedly the most important investigative tool in astronomy. It provides a means of collecting and analyzing radiation from celestial objects, even those in the far reaches of the universe.