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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
- As a method of standardizing the process, manufacturers use ISO 100 a nd a flash-to-subject distance of 10' as fixed reference points when calibrating guide numbers. An example of this formula: a flash unit with a GN of 40 would require an aperture of f/4 at a subject-to-flash distance of 10' (GN = 10' x f/4 = 40). Note: Some less-than-scrupulous (and invariably third-party) …
Guide Numbers Explained for Manual Flash - John Peltier …
- https://www.jmpeltier.com/guide-numbers-explained-manual-flash-calculator-chart/
- What is a guide number? 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.
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: 197′ (60 m) at ISO 100 … for the flash-head zoomed to 200mm. 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.
Flash Guide Number
- https://www.digital-slr-guide.com/flash-guide-number.html
- GN = 10 ft. x f/16 = 160. So there you have it: you can leverage the extra power of a flash with a high guide number in one of two ways: By using a wide aperture, you can light subects that are farther away. Staying the same distance from your subject, you're able …
Guide numbers for flash - Photography Tips, Tricks and Techniques
- https://www.photographytips.com/page.cfm/2172
- A guide number (GN) is an indication of a flash unit's power (how much light it gives off), and is used in a simple mathematical formula to calculate aperture. The formula is GN/distance = ƒ/stop. It is simply the product of a distance and an ƒ-stop that gives correct exposure with a certain film speed and flash unit.
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)
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.
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.
What is a guide number? Photography terms explained
- https://www.eos-magazine.com/articles/eospedia/what-is/guide-number.html
- 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 …
Camera Flash Guide Number Chart
- https://donner.medair.org/camera_flash_guide_number_chart.pdf
- Photography Tutorial #3 Flash Photography Lecture Part Seven - Guide Number and Exposure Control Zack Arias: Aperture/Flash Relationship Understand Flash Photography in 10 Minutes or Less Understanding Flash Duration: Exploring
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