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Understanding Flash's Guide Number (GN) — Daily Photography Tips
- https://www.dailyphotographytips.net/blog/flash-photography/understanding-flash-guide-number-gn#:~:text=Guide%20Number%2C%20usually%20abbreviated%20GN%2C%20determines%20power%20rating,at%20a%20particular%20shooting%20distance%20and%20ISO%20setting.
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Understanding Guide Numbers | B&H eXplora
- https://www.bhphotovideo.com/explora/photography/tips-and-solutions/understanding-guide-numbers
- GN = Subject Distance from Flash Source x f/Stop. Guide numbers are based on a simple mathematical equation that states: the light output of an electronic flash is equal to the distance of the flash unit from the subject multiplied by the lens aperture, or f/stop.
Guide Numbers Explained for Manual Flash - John Peltier …
- https://www.jmpeltier.com/guide-numbers-explained-manual-flash-calculator-chart/
- In short, guide numbers on a flash indicate how much light that flash can produce. You’ll see them in the specs indicated in either meters or feet. The higher the guide number the further the flash will reach. The specifications will also show the flash settings at which the guide number is calculated, including the ISO and flash zoom setting.
Tutorial: How to use the guide number of your flash
- https://neilvn.com/tangents/tutorial-how-to-use-the-guide-number-of-your-flash/
- Your flash’s Guide Number (GN) is determined at 100 ISO, when it gives correct exposure at a certain distance, multiplied by the f-stop The idea that we can figure out the manual flash exposure by the combination of distance and aperture (for a given ISO setting), was covered in these recent topics:
Flash Photography - Understanding Guide Numbers
- http://www.naturephotographers.net/articles0703/jm0703-1.html
- Flash Photography - Understanding Guide Numbers The burst of light from an electronic flash is extremely brief, lasting from what is a relatively slow 1/400th or 1/800th of a second to as fast as 1/50,000th of a second. At the slow end, the action-stopping ability of a flash is less than what is possible with a camera’s shutter speed.
Understanding Flash's Guide Number (GN) — Daily Photography Tips
- https://www.dailyphotographytips.net/blog/flash-photography/understanding-flash-guide-number-gn
- Understanding Flash's Guide Number (GN) April 12, 2011 in Flash Photography. Guide Number, usually abbreviated GN, determines power rating of flash unit that describes how powerful flash unit is and how far it can shoot. In another word, GN specifies the power of an electronic flash in a way that it can be used to determine the right f-stop to use at a particular …
Understanding Camera Flash Guide Numbers, plus GN …
- https://scantips.com/lights/flashbasics1c.html
- Guide Number (GN) is a numerical method used to determine exposure of direct flash for Manual flash power levels, to automatically deal with the Inverse Square Law, making the math be trivial. Guide Number = Distance x fstop (values which actually give a proper exposure) f/stop = Guide Number / Distance (aperture for other distances)
Understanding Flash Guide Numbers - Brad Bradley Photography
- https://www.bradbradleyphotography.com/blog/2016/11/understanding-flash-guide-numbers
- Understanding Flash Guide Numbers. November 18, 2016 • Leave a Comment. Ever wondered why your on-camera flash or speed light didn't stop the action? Here's a PDF on understanding Guide Numbers which are instrumental in determining effective flash to …
Making Sense of Your Flash's Guide Number - DIY …
- https://www.diyphotography.net/making-sense-flashs-guide-number/
- When it comes to flash specs, it doesn’t get much more confusing than the guide number (GN). Why is it so confusing? There are several reasons, actually, but the biggest reason of all is that the GN was never supposed to be a rating of flash output. It was, however, used to set the correct aperture for proper flash exposure at a certain distance.
Flash Guide Number - The Digital SLR Guide
- https://www.digital-slr-guide.com/flash-guide-number.html
- The guide numer is an indication of a flash's ability to overpower ambient light and brighten your subject. Flash Guide Number Formula There's a mathematical formula for calculating flash guide numbers: Guide Number = [Flash to Subject Distance] x [F-Stop]
What is a guide number? Photography terms explained
- https://www.eos-magazine.com/articles/eospedia/what-is/guide-number.html
- Photography terms explained GN: GUIDE NUMBER The power of a built-in flash or Speedlite is given as a guide number (GN). The higher the number, the brighter the flash. A guide number can be determined by taking a correctly exposed photograph of a subject and then multiplying the camera-to-subject distance by the lens aperture used.
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