Star Testing Astronomical Telescopes: A Manual for Optical Evaluation and Adjustment
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Condition - Very Good The item shows wear from consistent use, but it remains in good condition and functions properly. Item may arrive with damaged packaging or be repackaged. It may be marked, have identifying markings on it, or have minor cosmetic damage. It may also be missing some parts/accessories or bundled items.
Star Testing Astronomical Telescopes: A Manual for Optical Evaluation and Adjustment
This book is about telescopes that work properly and those that do not. If you have a new telescope that is not performing as well as other telescopes of equal aperture, the book gives you a no-nonsense technique of evaluating the optics doing exactly what they were designed to do - image the stars.
