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The Black Polymer Solar Filter for telescopes and other viewing devices is made from the same high quality materials as eclipse glasses
96 Relative Brightness: 6
Powermates pick up from where Barlows can go no further
With a full 8 inches of aperture
25") Weight 6bs (2
Making Your Own Telescope by Allyn J. Thompson Refractor The Black Polymer Solar FilterA book that has been used with great success by countless amateur astronomers, this volume presents complete and detailed instructions and numerous diagrams showing how to construct a do it yourself telescope. No complicated mathematics are involved, and no prior knowledge of optics or astronomy is needed to follow the text's step by step directions, which also offer instruction in the fundamentals of practical optics. Contents: 1. Story of the
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