![]() ![]() If it were a 10mm eyepiece you’d be able to achieve 100x and you could theoretically use a 1mm eyepiece to achieve a 1000x magnifications however, there is a limit to how much each telescope can magnify until the magnification becomes redundant. For example if a telescope had a focal length of 1000mm and you were to use a 25mm eyepiece for magnification purposes, that 25mm eyepiece would allow you to magnify up to 40x. The magnification of a telescope is determined by the focal length and the size of an eyepiece. As planets are a very large distance away from us, it’s important to know the magnification ability of a telescope as a larger power will allow for a more detailed viewing of planets. MagnificationĪnother very important thing you should know of is the magnification ability of a telescope. One downside to the larger focal length is that the field of view will be narrow however, if viewing planets is your main goal, the narrower field of view shouldn’t be too much of bother (of course if you want a larger field of view, you can always opt to purchase a eyepiece that’ll help with that). This means if you decide to go for a larger aperture telescope of let’s say 130mm, in order to have the best planetary experience with such a scope, you’d ideally need around a 1000mm focal length. So a telescope built for viewing planets should have a bigger focal length, preferably f/8 or above. The reason why you want the speed to be slow is because planets are among the brightest objects in space so gathering more light at too fast a rate isn’t the primary component in establishing a good planet viewing experience although a larger lens does mean you’ll get more detail. Ideally you want the speed at which the telescope captures light to be slow. There’s a lot of important components needed when it comes to creating a telescope that’ll be the best for viewing planets however, one element that’s very important in providing the best planet observation ability through the lens of your eyepiece is the focal length. ![]()
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