When it comes to reflecting telescopes, there are 2 models that you will often come across: Newtonian and cassegrain telescopes. If you haven't heard about them before, pay attention to their differences.
Newtonian. Newtonian reflecting telescopes are usually the simplest models, so they are recommended for people who have had little or no experience with astronomical research and exploration. For this reason, their price tends to be cheaper than Cassegrain designs.
The main feature of the Newtonian is its duality of mirrors for light and image collection: one parabolic and one flat. On the downside, they can lose the clarity or sharpness of what is observed as the diameter of the lens increases.
Cassegrain. These models are suitable for amateurs, but only when they have already had some contact with telescopes previously, as their handling and adjustment can be more complex. Their versatility and functionality allows them to be used by professional astronomers as well.
It has a parabolic main mirror perforated in its centre to receive the light coming from a convex secondary mirror. Their focal length is very large and wide, and due to their better performance and greater complexity of manufacture, they tend to be more expensive.