Refractor telescopes are what you use if you want to look at visible light regions of the electromagnetic spectrum. You will be able to view the moon and a variety of celestial objects within our solar system like Mars, Venus and Jupiter, as well as double stars.
The name of this kind of telescope comes from refraction. It is essentially achieved by bending the light as soon as it goes through one phase to another with a difference in density, such as air to coated glass. The glass, commonly called as the lens, actually has one or more parts.
Depending on the shape of the different parts of the lens, there could be different shapes like concave, convex or even plane parallel. Making sure that the focus is on a specific point while the light rays go through what is called infinity converge, with the distance traveled having a common focal length.
For a refractor telescope, the first lens will be where the light from an object located from outer space goes through, known as the objective lens. After that, the second lens, called the eyepiece lens, is where you observe the object and adjust the size and the magnification of it.
How does a refractor telescope work?
Using the diameter of the objective lens, also known as the aperture, the larger the refactor, the smaller the distant object can be brought into view. The objective lens itself is typically composed of different small parts. Along with the eyepiece, they make up the majority of the most important parts of a refractor telescope.
With them, you will be able to differentiate the distortions and aberrations of all the images, especially if you polish the lens into a specific shape or design.
What are eyepieces?
An eyepiece plays a key part for a refractor telescope. They have a lot of different usages, but an eyepiece is more known for its ability to change the magnification of the particular instrument. As you change the magnifying power, you will also be able to determine the division of the focal length of the objective itself through the eyepiece’s focal length.
As an example, it can be noted that if the objective has a focal length of 254 centimeters while the eyepiece has 2.54 centimeters, then you have a total magnification of exactly 100.
What do different magnifications mean?
A large magnification means that you have a lot more detail when it comes to looking at the moon and other planets within our solar system. The drawback to this is if you look at stars from great distances from outer space, then you will not have that same amount of detail.
It should be noted, as well, that one of the most important facts that has to be taken into account is that if you view something with high magnification, then the stability of the mount that the telescope is using has to be stiff.
What is the best refractor telescope?
Celestron 22096 Nexstar 102 SLT Computerized Refractor Telescope
The Celestron 22096 Nexstar 102 SLT is certainly the best refractor telescope to be released in recent years. It has a high-quality 102mm refractor, which is perfectly blended in with the computerized altazimuth mount.
For extra ease of usage, you have the StarPointer finderscope that lets you align the telescope to the primary objects that you are trying to locate. With its quick-release fork arm mount, optical tube, and accessory tray, this easy-to-assemble refractor telescope presents itself as a portable tool that you can bring and prop up anywhere to stargaze.
Features of the Celestron 22096 Nexstar 102 SLT
- High-quality 102mm refractor
- Fully computerized altazimuth mount
- StarPointer finderscope to help with alignment and accurately locating objects
- Quick-release fork arm mount, optical tube and accessory tray for quick no tool set up
- Sturdy stainless steel tripod and accessory tray included
There are not a lot of products that can compare with this release by Celestron. Along with its amazing features, you also get a 1x NexStar Telescope, a 1x25mm Eyepiece, a 1x9mm Eyepiece (1 ¼”), a 1×1 ¼” Star Diagonal, and other add-ons in the box. That means that you will have a variety of add-ons that you can take advantage of to complete the experience for you.
For newbies, the transition to this incredibly powerful refractor telescope might seem a little intimidating at first. Thankfully, it comes with a comprehensive manual and there are a lot of resources available on different publications to point you in the right direction.