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Thesaurus: focal ratio
the ratio of the focal length to the diameter of a (camera) lens system
Related headwords
focaldefinitioncameradefinitiondiameterdefinitionlengthdefinitionlensdefinitionratiodefinitionsystemdefinitionfocal distancefamilyfocal epilepsyfamilyfocal infectionfamilyfocal lengthfamilyfocal pointfamilyfocal seizurefamilyfocalisationfamilyfocalisefamilyfocalizationfamilyfocalizefamilyfocalizedfamilyfocalizesfamilyfocalizingfamilyfocallyfamilyfob offneighborfobbedneighborfobbingneighborfobsneighborfocineighbor