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DSLR Camera Basics | Flash Level (Guide Number) - Nikon
- https://imaging.nikon.com/lineup/dslr/basics/24/02.htm#:~:text=Guide%20number%20%28GN%29%3Ddistance%20%28meters%29%20%C3%97%20aperture%20%28f-number%29%20Using,subject%20can%20be%20up%20to%203%20m%20away.
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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/
- We’ll use a Guide Number of 60 meters in all of these examples. The flash guide number formula. Before we can understand anything further we need to know how the flash guide number (GN) is calculated. Distance * Aperture = GN. Flash exposure on your subject is dictated by aperture, ISO, and distance (see Inverse Square Law). Shutter speed doesn’t have much to …
What is a guide number? Photography terms explained - EOS …
- https://www.eos-magazine.com/articles/eospedia/what-is/guide-number.html
- 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. The distance can be measured in metres or feet and the ISO value used will also affect the result.
DSLR Camera Basics | Flash Level (Guide Number) - Nikon
- https://imaging.nikon.com/lineup/dslr/basics/24/02.htm
- Guide number (GN)=distance (meters) × aperture (f-number) Using the guide number, it is easy to calculate the how close the subject should be at a given aperture or the aperture required to photograph a subject at a given distance. If the flash unit has a guide number of 12 at ISO 100 and aperture is set to f/4, the subject can be up to 3 m away.
Tutorial: How to use the guide number of your flash - Tangents
- https://neilvn.com/tangents/tutorial-how-to-use-the-guide-number-of-your-flash/
- GN = distance * f-stop 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:
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)
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]
Making Sense of Your Flash's Guide Number - DIY …
- https://www.diyphotography.net/making-sense-flashs-guide-number/
- Since 80÷10=8, you would dial in an aperture of f/8 for proper flash exposure. Obviously “proper” means different things to different people, but you can see how the GN gives the photographer a starting point when it comes to setting exposure values. The same flash at 20 feet, for example, would use an aperture of f/4 (80÷20=4).
Flash Photography - Understanding Guide Numbers
- http://www.naturephotographers.net/articles0703/jm0703-1.html
- If f11 is best, then by simply following the GN formula of GN= f-stop X distance, or GN= f11 X 10 feet, you’ll get a GN of 110 for ISO 100 film. If you use ISO 50 film, the GN is NOT 55. Since ISO 50 is one stop less light sensitive than ISO 100, you’d have an …
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