What is a Cassegrain telescope used for?
Cassegrain reflector, in astronomical telescopy, an arrangement of mirrors to focus incoming light at a point close to the main light-gathering mirror. The design was proposed in 1672 by French priest Laurent Cassegrain.
What type of telescope is a Schmidt Cassegrain?
catadioptric telescope
The Schmidt–Cassegrain is a catadioptric telescope that combines a Cassegrain reflector’s optical path with a Schmidt corrector plate to make a compact astronomical instrument that uses simple spherical surfaces.
What is the difference between Dobsonian and Cassegrain telescopes?
These are two of the most popular variations of telescope. Focal length – Dobsonians and reflector telescopes in general tend to have a short focal length, whereas Cassegrain telescopes have a long focal length. The longer the focus, the higher the magnification.
How does Schmidt Cassegrain telescope work?
Schmidt-Cassegrain telescopes are a catadioptric design, meaning they use both lenses and mirrors. It is reflected from a concave primary mirror at the back of the scope which focuses the light to the front of the telescope where it is reflected again by a smaller, convex secondary mirror.
Why is the Cassegrain telescope shorter?
Why are Cassegrain telescopes shorter than Newtonian reflecting telescopes? Many websites say this is because the effective focal length of the objective is increased by making the secondary mirror convex. This allows a Cassegrain telescope to be shorter than a similarly powered Newtonian.
What are Schmidt Cassegrain telescopes good for?
They are also well-suited to a number of applications including photography and terrestrial observing as well as stargazing. Most new SCTs are computerized, adding to their ease of use and portability. Schmidt-Cassegrain telescopes are a catadioptric design, meaning they use both lenses and mirrors.
What is the difference between Dobsonian and Newtonian?
The answer is that Dobsonian and a Newtonian can actually be the same thing. A Newtonian refers to the telescope optics, whereas a Dobsonian refers to Newtonian telescope with some specific features like an altazimuth mount and often thin mirrors. A telescope can be a Newtonian and also a Dobsonian at the same time.
Who makes Schmidt Cassegrain telescopes?
Celestron
The market for commercially produced Schmidt-Cassegrains has been dominated by Celestron and Meade Instruments Corporation since the 1980s.
