![]() The optical performance is very good, with no major visual defects visible and we enjoyed the stunning contrast and clarity in the field of view. This process can be tricky for beginners, but with practice it's easily achieved – especially given Celestron has supplied a manual that walks you through the process. However, in order to get the very best from the optical system – which is a Newtonian reflector – you'll need to collimate the setup. Meanwhile its decent aperture will show a good amount of detail on solar system and deep-sky targets. The equatorial mount assists with tracking, which is essential for longer exposure astrophotography. If you're after the best telescope for astrophotography and serious stargazing, we recommend the Celestron AstroMaster 130EQ, which offers a great package for the slightly more experienced amateur astronomer – especially given that it comes with a CG-3 equatorial mount, which requires more practice and patience to use over the basic alt-azimuth. ![]() Meanwhile, the kind of mount you use will determine whether long-exposure astrophotography is possible. The focal ratio is also an essential number to consider – fast telescopes with ratios of f/4 or f/5 are great for wide-field and deep-sky imaging, while slow instruments with ratios of f/11 to f/15 will offer dazzling high-power images of the Moon and planets. The aperture (or objective lens) of the telescope will be your guide on whether it's capable of capturing 'faint fuzzies' or just enough to make the planets and lunar surface pop. If your needs are slightly more advanced, you should consider whether you're a deep-sky or Solar System imager. These instruments often come with a tripod, mount, eyepieces, finderscope and, often, a smartphone adapter. If you're a beginner, we recommend setting your sights on an inclusive package that lets you try a bit of everything, from general observing to afocal astrophotography. So, a telescope with a focal length of 1,000mm and a max magnification of 250x will benefit the best from a 4mm eyepiece.So which model should you buy? Well, that depends a lot on your level of experience. ![]() Depending on observing conditions, eyepiece magnification can perform at less than 35x every inch or up to 75x.Īdditionally, if you’d like to utilize every decimal of possible magnification for your telescope, you can divide the focal length of the telescope by the total magnification. So, if you’re picking up a 127 mm (5 inch) telescope, multiply 5 inches by 50, and you have a maximum magnification of 250x.Īnything beyond this point will most likely appear distorted, fuzzy, and dim. The maximum effectiveness for an eyepiece’s magnification is about 50x for every inch of your telescope’s aperture. There is always a limit to the effectiveness of magnification, depending on the telescope’s aperture. The shorter the eyepiece focal length, the greater the magnification, and vice versa. For instance, if a telescope has a 1000mm focal length, and the eyepiece focal length is 10mm, the total magnification of the eyepiece will be 100x. Eyepieces are a collection of lenses that magnify the light gathered by the lens or mirror at the front, presenting a clear image of whatever object you may be observing.Įyepieces have their own focal length as well, which, when divided by the focal length of a telescope, determines the magnification capabilities. But, for us to view the image clearly, telescopes require an eyepiece. The objective or front-end of a telescope gathers the light and focuses it through the tube.
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