![]() ![]() Refractors require less maintenance because they do not have mirrors that need collimation.Īccording to Terence Dickinson, author of astronomy books, reflectors 4–8″ can perform well for viewing the Moon, planets, and other bright objects in the night sky. But with the right tools and practice, it will only take you 10 minutes or so. In cases of larger reflectors, this could be every time you move it to a new location. The bigger the objective in the reflectors, the more regular the need for collimation. I wrote about this in How to Collimate a Dobsonian. Reflectors need collimating more than refractors. Making sure to store the telescope properly will help avoid unneeded cleaning. Reflectors have mirrors that might need cleaning and aligning from time to time. I wrote about ‘astigmatism’ a type of aberration in refractors, the causes, and the solutions. ![]() The presentation of aberrations will depend on the quality of the optics and design of the telescope in both types. Aberrations can be reduced or eliminated through the use of special lenses or mirrors.Cheaper refractors are more prone to chromatic aberration, while reflectors are more prone to coma aberration.Doublets are less costly, but triplets, designed to eliminate this issue, cost more. Look for telescopes with compound lenses (different types of glass) to correct color aberrations. Aberrations can affect image quality in both types. As a general rule – Refractors tend to provide sharper and clearer images with less distortion.
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