Guide number

From Camera-wiki.org
Revision as of 17:31, 28 May 2006 by U. kulick (talk | contribs)
Jump to: navigation, search

The guide number is a value indicating the strength of a flashlight. According to Andreas Feininger the guide number helps finding the right aperture for flashlight exposures with the formula

    guide number

distance between flash and image subject

Retrieved from "http://camera-wiki.org/index.php?title=Guide_number&oldid=23796"