Flash Guide Number Calculator
Flash Guide Number: a planned Super Calculator tool. Covers guide number. Stub page: the tool, its formula and a worked example are not published yet.
Flash Guide Number Calculator is a planned calculator in the technology section of Super Calculator, covering exposure.
What this calculator will compute
Inputs: guide number, distance, aperture, ISO and zoom head setting.
Formula, recorded as scope and not yet verified against a primary source: GN = aperture * distance at ISO 100, distance = GN/N, GN scales by sqrt(ISO/100).
Written for flash users setting manual power for a known subject distance.
Status
This page is a stub. The calculator is not built, no figure on this page has been verified against the authority that sets it, and nothing here should be used to make a decision. The page exists so that the site structure is complete and so that articles can link this concept on first mention.
The stub carries noindex, nofollow and is excluded from the sitemap.