Photography Basics

Photography

A digital camera takes light and focuses it via the lens onto a sensor made out of silicon. It is made up of a grid of tiny photosites that are sensitive to light. Each photosite is usually called a pixel, a contraction of "picture element". There are millions of these individual pixels in the sensor of a DSLR camera.

The sensor in a digital camera has a particular fixed sensitivity to light. To achieve the correct exposure for an image, just the right amount of light must be let ...