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 value at OneSlidePhotography.com
In computing, JPEG is a commonly used method of lossy compression for digital photography (image).It is the most common image file type captured by digital cameras, from standard point-and-shoot to DSLRs, and it provides easy compatibility with desktop software and Internet upload sites. The term “JPEG” is an acronym for the Joint Photographic Experts Group […]
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