This telescope uses a parabolic mirror and is relatively cheap to make. Generally speaking, these are fast telescopes (focal ratio between 3 and 8 approximately). This makes them desirable for wid.efield visual observations and deep sky photography.
However, it requires a relatively long telescope tube. Apart from that, these telescope have two very prominent image errors: coma and field curvature. additional optics to create an image that is corrected and suitable for photography.
Casse.grain telescope
This telescope is shorter but it has the disadvantage of slower optics. A shorter telescope tube requires a somewhat lighter telescope mount. Apart from that, they are a bit more expensive than a Newtonian of the same size. This makes them generally suitable for planetary observations and planetary photography.
Actually a Casse.grain is a general name for a whole family of telescopes. Among these the Schmidt-Casseg.rain, Mak.sutov-.Casse.grain, Classical Casseg.rain, Dall-Kirk.ham and Ritche.y-Chretien are the most well-known. But this article would become too long to describe everything in full detail.
The differences between the Newtonian telescope and the Cassegrain telescope are:
The Newtonian telescope is a reflecting telescope that works with a diagonal mirror that reflects the light out the side of the telescope. So, the eyepiece is at the side of the telescope. This design is generally used in smaller telescopes. Initially, the light enters from the left side and hits the telescope at the primary mirror at the back. The focused image bounces off of a secondary mirror and then to the observer's eye.
TheCassegrain telescope is a reflecting telescope where the secondary mirror reflects the light back through a hole in the center of the primary mirror. The difference between the Cassegrain and Newtonian telescopes is that in a Newtonian telescope, the light rays are reflected in an eyepiece that's at the back of the telescope whereas in Cassegrain it is at the side of the telescope.
These are the main differences between the Newtonian telescope and the Cassegrain telescope.
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Newtonian telescope
This telescope uses a parabolic mirror and is relatively cheap to make. Generally speaking, these are fast telescopes (focal ratio between 3 and 8 approximately). This makes them desirable for wid.efield visual observations and deep sky photography.
However, it requires a relatively long telescope tube. Apart from that, these telescope have two very prominent image errors: coma and field curvature. additional optics to create an image that is corrected and suitable for photography.
Casse.grain telescope
This telescope is shorter but it has the disadvantage of slower optics. A shorter telescope tube requires a somewhat lighter telescope mount. Apart from that, they are a bit more expensive than a Newtonian of the same size. This makes them generally suitable for planetary observations and planetary photography.
Actually a Casse.grain is a general name for a whole family of telescopes. Among these the Schmidt-Casseg.rain, Mak.sutov-.Casse.grain, Classical Casseg.rain, Dall-Kirk.ham and Ritche.y-Chretien are the most well-known. But this article would become too long to describe everything in full detail.
hope it helps you Rina (:
The differences between the Newtonian telescope and the Cassegrain telescope are:
These are the main differences between the Newtonian telescope and the Cassegrain telescope.