In photography, exposure refers to the light level, and so it is important to comprehend the image that represents the very basic pillar determining the end results of the image. When holding an image sensor, the basic three important features dealing with exposure are the aperture setting, the length of time the shutter is opened, and the level of sensitivity of the sensor to light—ISO. The relationship among these three parameters is quite fascinating—there is constant interchange. It’s almost as if each performs a dance, with one step depending on another. The aperture is the largest diameter of the lens opening while the shutter speed is the amount of time the camera’s sensor is in contact with light, the iso is the measure of the sensor’s sensitivity to light. The photographer is able to acquire an excellent amount of exposure with these three concepts in mind, and the opposite is true as well if none of the three is considered images will be overexposed or underexposed.