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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 …
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)
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.
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]
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/
- Guide Number: 118′ (36 m) at ISO 100 … for the flash-head zoomed to 35mm The GN of 118 is close enough to the Nikon’s that the explanation is the same for 35mm flash-head zoom. For the flash zoomed to 35mm, the aperture would be 118/10 = f/11 (If your Math insists it isn’t f/11 keep in mind that the next 1/3rd stop setting down from f/11 is f/13)
Flash Photography - Understanding Guide Numbers
- http://www.naturephotographers.net/articles0703/jm0703-1.html
- Following the formula, GN=f-stop X distance, you’d have GN= f8 x 10 feet or GN of 80. Just to drive the point home, the GN for ISO 200 film would be 160 since you gain a stop of light with the faster film, so GN= f16 x 10 feet or 160. High guide number flashes provide a greater reach or working distance for a flash.
Photo Composition Tip: Three is a Magic Number
- https://www.outdoorphotographyguide.com/article/photo-composition-tip-three-magic-number/
- Three can be a powerful number for photography, so be on the lookout for scenes involving three subjects. When three subjects come together and interact, interesting compositions can be the result. Want to learn more?
Flash Guide numbers for Manual mode photography
- https://www.photo.net/discuss/threads/flash-guide-numbers-for-manual-mode-photography.347860/
- First, the guide number of 20 is probably in meters, not feet. If your going by the Nikon specs use 66 feet as your guide number. 1) your right about adding 2 stops when shifting from ISO 100 to 400 3) yes, you calculated as it were 20 feet, not meters. 4) you should start with the sticker recomendations.
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