| The Use of Filters | |
| Link ID | 1661 |
| Title | The Use of Filters |
| Url | http://sciastro.net/portia/advice/filters.htm |
| Description | One of the puzzles of visual astronomy that many beginning amateur astronomers get caught up in is the use of filters. Which ones to purchase, ... |
| Category | Filters |
| Date | 08-Jul-2007 |
| Contact Name | |
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