How Do Telescopes Work?
Telescopes use a comfortable eyepiece to study details that are collected with light, brought into focus and developed into an image. Telescopes have the ability to collect more photons than the eye. They help you to see the fainter objects that cannot be seen with the naked eye. Smaller details emerge in the images because the objects are magnified.
How to Use a Telescope Properly
It is vital to point out that each telescope works differently, and has its own particular set of instructions. It is imperative for you to read the instructions if you purchased a complicated telescope. Reading the instructions can help you learn and master the features.
What To Consider Before Buying a Telescope?
What is your goal with your telescope? Observer objects? Are you interested in photographing objects? Do you want a stationary or transportable telescope? See the stars, or look at the illustrious planets?
Refractor vs. Reflector vs. Catadioptric
1. Refractor Telescopes
The refractor is the first thing that comes to mind when someone hears the word “telescope”. Refractors are designed to collect light with an objective lens at one end and focus the light at the eyepiece at the other end. Refractors were at a point where they were becoming obsolete, but they made a big comeback due to modern glass elements.
Advantages of Getting a Refractor: They can capture the best images, and there is no obstruction in the light path.
Disadvantages of the Refractor: Some secondary colour will be visible except the best units. Large aperture instruments can be incredibly massive. It is the most expensive out of the three designs. It can be mistaken for the cheap telescopes (reflector) being sold by department stores.
2. Reflectors Telescopes
The Newtonian Reflector uses a parabolic mirror located at the end of a tube, and focuses the light back at the front of the tube, where the eyepieces is located, after being deflected by a smaller mirror in the path of the light.
Advantages of the Reflector: It is the cheapest of the three designs, it is easier to carry around, and is inherently colour free.
Disadvantages of the Reflector: Expect to lose some contrast. It is considerably large when compared with Schmidt-Cassegrains. At times, it requires collimation (alignment) of optics.
3. Catadioptric Telescopes
The Schmidt-Cassegrain and its relatives (Schimdt-Newtonian, Maksutov-Cassegrain, and etc.) use both lenses and mirrors to fold the optical path carefully back onto itself. A Schmidt-Cassegrain telescope is also known as an “SCT.”
Advantages of the SCT: It is the most compact out of the three designs. It is cheaper than refractors, and it has a large assortment of after-market accessories.
Disadvantages of the SCT: It costs more than reflectors. Images are potential poor when compared to the other two designs.