![]() Cassegrain reflectors add a curved secondary mirror to the classic design, which means they’re more compact.Are there any other types I should know about? While reflectors are generally better for viewing deep-sky objects (galaxies, nebulae and the rest), they may not offer such clear, bright views of nearer objects and planets. Reflectors don’t have this problem, but the mirrors may need to be manually adjusted, and unless you have a special eyepiece, the view will be upside down. However, they’re more likely to suffer from chromatic aberration, where bright objects – such as a star – appear surrounded by a halo of different colours. What are the key differences between the two?īoth types have their strengths: refractors are sealed, which means dirt can’t get in and you can get a sharper image, particularly of bright, near-sky objects such as the moon or planets. A refractor uses one or more lenses to do the same job. ![]() A reflector telescope uses a large parabolic mirror to harvest and reflect the incoming light to another mirror, which in turn reflects that light into the eyepiece. Telescopes come in two basic types: reflectors and refractors. How to choose the best telescope for you What types of telescope are there?
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