Static Blur Tutorials

Here are the essentials of photography.

How a camera works
Light, which exists all around us, even in the darkest conditions, enters the camera through the lens. When the shutter is open, the light travels through the aperture and hits the film or the digital sensor. The aperture is a part of the lens that can be changed to make bigger or smaller, controlling the amount of light that enters the camera. To capture images that are not blurry the shutter must only be open for a fraction of a second. The shutter is a part of the camera body which acts a lot like a curtain on a stage. It quickly opens and closes to let light into the camera. The shutter is often open for a very short about of time. It can be open from 1/2500 parts of a second to 32 seconds on most DSLR cameras.

The size of the aperture and the shutter speed are the most important controls on the camera. If the shutter is open too long, too much light will enter the camera and the photo will be overexposed. If the aperture is too small, not enough light will enter the camera and the photo will be underexposed. These two controls are adjusted simultaneously to produce a well exposed photograph.

A third control used to expose a photograph is the ISO. This number measures the sensitivity of the film or digital sensor. In film cameras the ISO is determined when the film is made and the photographer has to choose the ISO he/she wants when they are buying the film. In digital cameras the ISO can be changed from one photo to the next. There's always an advantage and disadvantage to every setting on the camera. I high ISO value will result in a brighter image than a lower ISO with the same shutter speed and aperture values. However, as the ISO increases, the photograph starts to get more and more noise in the image.