原帖由 willis 於 2009-2-8 18:25 發表 Pros: A 10x60 binocular can gather about 44% more light compared with a 10x50 binocular. ( (60/50)^2 = 1.44 ) So a 10x60 forms brighter images . In addition, a 10x60 binocular has a higher resolu ...
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Archiver|手機版|小黑屋|香港天文學會
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