![]() The Newtonian telescope uses a spherical-ground metal primary mirror and a small diagonal-mirror. This design is referred to as the Newtonian telescope. Sir Isaac Newton is considered to be the creator of the first reflecting telescope in 1668.One of the most important telescopic designs was the Gregorian telescope proposed by James Gregory in 1663 and was built by experimental scientist Robert Hooke in 1673. The use of parabolic mirrors in such telescopes has reduced spherical aberration leading to several telescopic designs following the reflection principle.Additionally, telescopes that operate with wavelengths of light other than the visible range (such as X-RAY telescopes) also use the principle of reflecting telescopes. ![]() Prominent telescopes like the Hubble Space Telescope and some amateur telescopes are based on this microscopic design. These telescopes are commonly used for astronomical purposes. Since reflecting telescopes/reflectors involve mirrors, they are termed as “ catoptric” telescopes. These telescopes come in different design variations and also includes additional optical elements at times for enhancing the image quality or mechanically improve the position of the image. But hopefully, you now have the tools to know which one is the better fit for you.A reflecting telescope is developed based on the principle of light reflection by a mirror or a combination of curved mirrors to generate an image. Maksutov-Cassegrain pros and cons ProsĪs you can see, both types have many advantages and disadvantages. Newtonians on the other hand only take 5 to 10 minutes to do so. Depending on where you store them, you might want to take them out an hour before you use them to give it time to acclimate. Maksutovs take considerably longer to acclimate. This means that if you bring them outdoors on a cold night from storage where it might have been warmer, it will take a bit for the telescope to settle to ambient temperature. Telescopes need to be at ambient temperature in order to perform at their best. This process is called “collimation” and while it sounds intimidating, anyone can do it with a little bit of practice.Īgain, they both have pros and cons in this area because Newtonians do require collimation every few months, but it is easy to do, while Maksutovs need to be collimated maybe once every couple of years, but they are trickier to collimate. If you have never used a telescope or if you are coming from using a refractor that never or almost never needs maintenance, you might not know that every once in a while the mirrors in the telescope need to be re-aligned or they’ll start showing small optical errors. The following diagrams show how each transmits the light.Īnother important thing to consider is collimation. The light travels back and forth across the tube 3 times thanks to the secondary mirror at the end of the tube. How is that even possible? Well, that’s because the design of Maksutovs is very clever. On the other hand, MAKs pack a longer focal length into a smaller tube and a more compact design. The light only travels through the tube once, which makes the focal length of a newt almost the same as the length of its tube. Newtonians transmit light by using a long tube and reflecting the captured image into a second mirror that sends it to the eyepiece. Differences between Maksutov-Cassegrain and Newtonian/reflector telescopes To keep things short we will sometimes refer to Maksutov as MAKs and Newtonians as newts. So here are the differences, pros, and cons of each other to help you make a more educated choice. When you compare them to refractors or Dobsonians, they have clear advantages and disadvantages, but when you compare them to each other, things can get confusing. The options can get overwhelming.īut one of the hardest pairs to choose from is when you face Maksutov-Cassegrain vs Newtonian telescopes because they are very similar to each other in many categories. There are so many types to choose from: Refractors, Newtonians, Dobsonians, various types of Cassegrains, etc. One of the decisions that can be harder to weigh when it comes to choosing a new telescope is what type of telescope is best for your particular needs.
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