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
The day we’ve all been waiting for is finally here! The Canon 5D Mark III has officially been launched. This is a professional grade DSLR designed for professionals and amateur photographers dreaming of a light-weight high-quality camera. The Canon 5D Mark III will go head to head with the recently-launched Nikon D800 in the market. […]
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 […]
Image credit: Photograph by John Noerr What would you do if your camera and its memory card plunges into a muddy creek during a camping trip? Of course, with a heavy heart, you’ll give the camera up and deem it lost. Even if you’re to be able to find it, it’ll be in a state […]
Generally, when people choose a lens, they seldom consider the amount of blades in the lens’ aperture. But in fact, the amount of blades is very very important if your photography interests include photographing elements of light or the sun and love achieving that star effect. The difference in aperture settings doesn’t only affect the […]
When starting to get acquainted with the world of digital photography, you will sooner or later hear of this EXIF term. It may be from the camera manual, heard it in a conversation among photographers, or when reading a thread in a photography forum only. So what exactly is EXIF metadata? Basically, metadata is a […]
Here are some tips of how to take a stunning sunset photography. A golden hour time, with special atmosphere, that very great time to take a photographs. Let’s see some technique and tips for take a better sunset.
One of the weaknesses of Canon camera is when you often find “ERR99” popping up while you use it. For most users of this brand camera, this error message is one general or usual thing that happens quite often. But at times, it can be very annoying because when it appears it means that your […]