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Focal distance   /fˈoʊkəl dˈɪstəns/   Listen
Focal distance

noun
1.
The distance from a lens to its focus.  Synonym: focal length.





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"Focal distance" Quotes from Famous Books



... seen that the glass placed at the observer's eye produces the magnifying power, and the object-glass which bears this power the best is the one that has the largest diameter and the greatest focal distance. In order to magnify 48,000 times it must be much larger than those of Herschel and Lord Rosse. There lay the difficulty, for the casting of these mirrors is ...
— The Moon-Voyage • Jules Verne


Words linked to "Focal distance" :   distance, focal length


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