what telescope should i look for?
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Light Vortex Astronomy - Article: How to Very Accurately Calculate your Telescope's Effective Focal Length
Solved 7. You are building a reflecting telescope using a | Chegg.com
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what telescope should i look for?
How Fast is Your Telescope?
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Light Vortex Astronomy - Article: How to Very Accurately Calculate your Telescope's Effective Focal Length
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Formulas - Telescope Magnification
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