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| Focal Ratio
Forum List | Follow Ups | Post Message | Back to Thread Topics Posted by John Manetas/">John Manetas on March 3, 1999 11:44:45 UTC |
What is the significance of the focal ratio for the objective mirror,except of the length of the tube? f/6 or f/7 meens also smaller or biger enlargement of the observed object? Thanks! |
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