How can eyepieces offer a telescope's widest true field? - Sky & Telescope - Sky & Telescope

Some eyepieces are being advertised as offering the widest possible true field in any telescope. How is this determined? The amount of sky shown by an eyepiece is governed by […]

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When building a refracting telescope, does the diameter of the eyepiece matter? And why do we need to move the eyepiece (as in my textbook) if the image is always focused at

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How can eyepieces offer a telescope's widest true field? - Sky & Telescope - Sky & Telescope

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