What is the focal lenght requered for prepare telescope for abserving moon?
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The main specifications for a really useful first telescope should be, a minimum aperture of at least 90mm for a refractor or 130mm for a reflector and 1,000mm focal length for each.
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The focal length requered for prepare telescope for moon at least 90mm for a refractor or 130mm for a reflecto and 1000 mm focal leanth for each
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