• Skip to primary navigation
  • Skip to main content

photo-facts.com

The digital photography A-Z

  • A-Z
  • Blog
  • About
  • Show Search
Hide Search
You are here: Home / Archives for Watt-seconds

Watt-seconds

Watt-seconds is the usual measurement for the power output of professional flash systems. 1 watt-second is equivalent to the power of 1 watt for a period of 1 second. It’s used because it’s a measure of raw power output independent of any lighting modifiers, angle of coverage or reflective surfaces

It’s only smaller, consumer-orientated flashguns that quote guide numbers. These give an indication of a flashgun’s range at a given aperture and zoom setting, but the test conditions are often not well specified.

Sorry, no content matched your criteria.

photo-facts.com

Copyright © 2023 · Monochrome Pro on Genesis Framework · WordPress · Log in

  • Home
  • A-Z of articles
  • A-Z of tags
  • About
  • A-Z v2
  • A-Z index