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 GN in photography at OneSlidePhotography.com
If a camera digital which is not designed to be water-resistant fell into the sea, what could possibly happen? The hugest possibility is the images saved inside the camera would be damaged. Maybe that’s exactly what Paul Burgoyne thought when his camera (Panasonic Lumix) was drowning to the sea, together with the ship he was […]
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