GN, short for Guide Number, Is the amount of power the light transmitted by a flash device is. It’s the result from multiplying distance (in meter or feet) and aperture.
The power of the flash is measured with the GN which describes the flash’s capacity in illuminating objects within a certain distance (in meters). Modern flashes supports TLL technology that allows it to set its power according to the distance the object is to the camera, so the risk of it being too bright or too dark can be eliminated. Read the rest of this entry » .
Related Photography Ideas for how to calculate guide number at OneSlidePhotography.com
When I read photographers’ success stories, I often ask myself, are there certain traits that make certain photographers successful? After some pondering this past week, I’ve concluded that there are three main traits that determine the success of a photographer: The first trait is courage Courage is very important and distinguishes the work among the […]
Focal length of 50mm is popular because the field of view that’s in focus is approximately what you see in the real world. There is no distortion of space like in ultra wide angle lens, and it is not compressed like telephoto lens.Therefore, focal length of 50mm is also an honest lens. Because it does […]
The story behind of an African child in Sudan who was starving in a Pulitzer Prize winning photograph is revealed. Till date, some rumors about Kevin carter piece above are still doing the rounds. A Pulitzer Prize winning photo in 1994 that shows a gaunt little child with a vulture as the background is always […]
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UV filters are the must-have accessories for a new lens. Physically, this filter resembles an ordinary transparent round piece of glass. And there’s also an extra coating on the pricier branded UV filters like in HOYA, Tiffen, B+W, and others. This extra coating adds extra quality to the filter. The general use of a UV […]