![]() There are ways to reduce chromatic aberration. This happens because the lens is either unable to bring all wavelengths of color to the same focal plane and/or when they are focused at different areas on the focal plane and causes a mismatch in color at the focal point. refractors) when colors are refracted/bent incorrectly. color fringing or color distortion/dispersion) differently, which is a common problem in lenses (i.e. Each of these styles is designed to reduce chromatic aberration (i.e. Modern refractor/refracting telescopes come in two styles: achromatic and apochromatic. In the past, I have written about my thoughts on using a refractor for astrophotography, and that I think it is the best choice to get started in deep-sky astrophotography. This lens is usually made up of two or more lens elements where light is bent (or refracted), as it passes through the tube, to produce a clear image and reduce distortion. Reflector telescope manual#In the video below, I discuss the type of telescope I would recommend for a complete beginner (a manual Dobsonian reflector).Ī refractor telescope has a glass objective lens as the main focusing unit to collect light at the front of a long tube. Unfortunately, there is no one-size-fits-all telescope for great visual observations, and practical astrophotography too. Below are the three main types of telescopes, including the advantages, disadvantages, and a few examples of each type of telescope that I have experience with.Īs an astrophotographer first, visual astronomer second, I understand the confusion that some folks have about choosing their first telescope. These two factors will create a unique viewing experience based on the type of experience you are looking for. The focal length determines your field of view and will impact how far you will be able to see through your telescope and aperture will determine how much light you will capture and the level of detail. Aperture (Size of Objective Lens/Primary Mirror).When choosing a telescope there are many different characteristics that come into play, but arguably the two most important factors will be your desired focal length and aperture.Ī 150mm diameter refractor telescope. People often focus on the magnification of the telescope, which is actually less important than the instrument’s ability to collect more light than the observer’s unaided eye can. The main goal of any astronomical telescope is to gather light. visual, photography, planetary, deep-sky, etc.), your available budget, and the level of complexity you want to take on for your equipment set-up. If you are a beginner and looking to purchase your first telescope, it is recommended you have a clear vision for what you want to use it for (i.e. Setting up my Schmidt-Cassegrain telescope for a night of astrophotography. For astrophotography purposes, a compact apochromatic refractor is best. I consider a Dobsonian Reflector to be the best telescope type for a beginner due to its combination of ease-of-use, function, and affordability. There are many variations and hybrid designs for each type. The three main types of telescopes are refracting telescopes, reflecting telescopes, and catadioptric telescopes. Soon after, Galileo improved on this refracting telescope design and applied its uses to astronomy. The first type of telescope ever designed was a refractor, designed by an eyeglass maker in the Netherlands in 1608. Telescopes come in a variety of designs, some of which have been around since the 1600s. There are many different types of telescopes available for those interested in exploring the night sky. ![]()
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