Sunday, November 7, 2010

Elements of a Photograph

So I don't have any new photos to share so I just thought I would talk about a little photography insight. Are you familiar with the three functions of a camera that are used to produce your image? You may have seen something like an "exposure triangle" such as the one below.

On your SLR camera and with some non SLR cameras, you probably have noticed on the top dial that there are some different settings. These settings vary between the different camera models. For Nikons, the "S" stands for "shutter speed priority" and the "A" stands for "aperture priority". When you are on either of these modes, you can change either the speed at which the camera take the photo (shutter speed) or the size of the hole in which the photo is shot through (aperture or f-stop). With a low shutter speed, the camera 's shutter is held open for how ever long you set it. This can result in light being stretched out. If you have ever seen a photo of a car's headlights that are stretched out behind it, that is the result of a low shutter speed. A hight shutter speed captures things quickly, exposing the camera to little light. A wide aperture or f-stop can cause a subject to be in focus while the rest of the photo is blurred (f/5.6). With a more narrow aperture of maybe f/32, the entire photo would be in focus.  ISO or ASA controls how much "noise" or grain is in a photo. This is usually found either on the settings dial or in the camera's menu. ISO of 100 is usually for good light. In less light, it is better to increase the ISO to about 1,600. It is always good to be controlling the shutter speed as well, usually 1/15 of a second.
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