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| Focal Length
Forum List | Follow Ups | Post Message | Back to Thread Topics Posted by John/">John on July 21, 1997 23:00:20 UTC |
Could somebody help me remember the uses of different focal ratios in viewing celestial objects? If I remember, I long focal length and high focal ratio works well with planetary viewing. Short focal lengths and/or low focal ratios perform well with wide angle, but dim objects. Thoughts? |
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