A lens telescope (or refractor telescope) is a type of telescope that first comes to life in the mind when it is actually called a telescope. A telescope is a habit that comes to mind first, usually standing on three legs, looking at it with our eyes from behind a long thin tube, or devices located in observatories equipped with a lot of equipment that we can’t understand what is around it. However, there are many types. The lensed telescope is one of them.
What Is A Lens Telescope (Refractor)?
Lens telescopes (refractor telescopes) are telescopes that use lenses in their optical system, as they also get their name. This may seem strange to you, but there are also mirrored telescopes that do not use lenses. Even in observatories, giant telescopes are all mirrored telescopes. Telescopes with lenses are generally preferred by amateur astronomers today.
In front of lensed telescopes, it is an optical lens that collects light. This focuses the light on another lens behind the telescope tube, from which the image is transmitted to the eye. Because the image is reversed in this system, a diagonal mirror is used to correct the image. If it is not already in use, if the telescope is looking up enough, you need to lie on the ground and observe because the exit point is towards the ground.
The problems of lensed telescopes are quite large compared to mirrored ones. Although the cheapest telescopes sold are telescopes with lenses, mirrors are actually cheaper in terms of cost. But since a telescope with a lens comes to mind when it is called a telescope as a perception, unfortunately, many telescopes that we call “toys” are telescopes with a lens. Because they are very cheap, the quality of the lens is also very low, so they are useless except to break the enthusiasm.