Sharpen images with a cardboard mask.
| Autor: | Knott, M.L. |
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| Předmět: | |
| Zdroj: | Astronomy; Feb1989, Vol. 17 Issue 2, p84, 2p, 4 Illustrations |
| Abstrakt: | A simple mask on a reflector can produce cleaner images of double stars and planets. Discusses factors that contribute to less-than-sharp images that a telescope delivers, the advantages of a small scope, and how to construct a cardboard mask. |
| Databáze: | Complementary Index |
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