This phenomenon is known as “Coma” and in longer (F6 or more) focal ratios this is not a major problem. Short focal length reflector telescopes focus the light to the same focus at the center and edge of the image. 3/ Reflector Telescopes and CA:Įvery reflector is apochromatic, every light wavelength is focused at a single point and this produces no CA problems. But this phenomenon can be minimized with certain optical glass types. This is very noticeable in refractor telescopes with a shorter focal ratio. This can cause chromatic aberration (CA) which creates unwanted colors on the surface of bright objects. Most refractor telescope lenses don’t focus every incoming wavelength of light to the exact same point. Refractors use lenses and reflectors use mirrors for this purpose. 1/ Collecting and Focusing Incoming Light: Reflector vs Refractor Telescopes: What are their differences To determine which is better, reflector or refractor telescopes, let’s take a look at nine major differences. There is no need for collimation to create a clear image.The images appear in a right-side up orientation.These are closed systems that protect the lenses.Refractor telescopes are beginner friendly and easy to use.What are the Advantages of a Refractor Telescope? The smaller models have a significant advantage when it comes to portability which is ideal if you want to view them in different locations. Observing beyond the Moon and out to nearby planets is certainly possible for newbie astronomers and those with more experience. What is a Refractor Telescope Used for?Ī refractor telescope can be a better option when it comes to viewing a deep-sky object. This makes them a portable option that is a great option for terrestrial and celestial viewing. The smaller refractor telescopes are usually smaller than reflector telescopes. Manufacturing these special lenses is a time consuming and difficult process and the largest refractor telescopes can be very expensive. The size of the lens will determine the length of the optical tube and the overall size of the telescope. Reflector telescopes are very affordable.Ī refractor telescope uses special lenses to focus the incoming light and this forms the image.These are ideal telescopes for new astronomers.The mirrors prevent chromatic aberration (blurring).The large aperture makes these telescopes ideal for viewing deep-sky objects.A reflector telescope can capture a lot of light for an improved viewing experience.Certain telescope models can be very expensive, but you can get a good reflector telescope for a modest investment. These types of telescopes are considered to be an ideal starting point for newbie astronomers due to their lower price point. What are Reflector Telescopes Used for?Ī reflector telescope maximizes the amount of light in the image and this is important if you want to view celestial bodies. But, larger telescopes are harder to transport and store safely and this should be considered carefully before you make a final decision. Purchasing the largest reflector telescope that you can afford is a good option if you want a high-aperture scope without breaking the bank. These telescopes are available in a wide variety of sizes, but the larger models can be very big and heavy. Reflector telescopes are less prone to color fringing which means that you’re going to be getting good value for money for a relatively high aperture.Ĭertain models even have a simple to use rocker box mount to improve the support. Reflector telescopes tend to be more affordable because mass mirror manufacturing is cheaper than making large single lenses found in refractor telescopes. This extends the overall path of light to improve the overall viewing experience. The mirror inside a reflector telescope reflects the incoming light at different angles inside the optical tube.
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