Compact cameras are still cameras designed primarily for simple operation. Most use built in autofocus for focusing, automatic systems for setting the exposureEXPOSUREExposure is controlled by three elements: Aperture, Shutter Speed and ISO. Achieving the correct exposure is similar to collecting rain in a bucket, up to an optimum level. The rate of rainfall is out of your control (light), yet you can control these three factors: the bucket’s width (lens aperture), the duration you leave it in the rain (shutter speed), and how effective your bucket is in collecting rain (ISO). These three elements work together to control the amount of light per unit area, preventing underexposure (too dark) or overexposure (too bright), giving you a natural looking image. options, and many have flash units built in. Some have more manual functions than others. These cameras tend to be small and portable. This section is the complete collection of Compact cameras by Olympus available from Outdoorphoto.