![]() ![]() Watch our laser collimation tutorial for more information. Thankfully, there are quick and easy ways to collimate a telescope nowadays. A refractor is usually perfectly collimated that is optically aligned and tends never to need collimation whereas reflectors to tend to lose their. Can’t decide on your first telescope for astrophotography In this video, I give you all the information you need to make an informed decision, as well as lo. But this design can also result in images that are sharper and less distorted around the edges than those produced by a reflector. The tube of a refractor is usually long and slender, which can make it more difficult to balance than a reflector telescope. You will need to learn how to collimate the mirrors if you are purchasing a reflector telescope. A refractor telescope uses a lens to collect and focus light. These mirrors reflect light at various angles within the optical tube, extending the overall light path. It needs to be collimated - This is probably the most important point. Whereas refractors use lenses, reflectors use mirrors. It is much larger and heavier - Don't expect to carry it with one hand! It is also 17.5 pounds, which is 10+ pounds more than a small refractor. ![]() If you don't care about very large targets (like the Heart Nebula or the North America Nebula), then you'll like being able to capture smaller objects. ![]() It has a longer focal length - This can be a good or a bad thing. It is much faster - This telescope has a focal ratio of 3.9, which is very fast! The fastest refractor in the list above is 4.5, but most small refractors have a focal ratio of 6. Comparing a 120mm refractor to a 130mm reflector: Wouldnt the smaller refractor actually show a better, brighter image than the 130mm reflector considering the secondary mirror obstruction The refractor in question is an achromat. It is much cheaper - The 8" Astrograph costs $499 ($479 when on sale, although as of 2023 the price is now in the $600's.), making it the most affordable telescope in this list. ![]()
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