DIGITAL CAMERA FUNCTIONS & FEATURES
This section contains articles that relate to the functions and features of a digital SLR camera.
Aperture is the opening in the lens when a photo is taken. The camera's aperture setting controls how much light can pass through your camera lens. The aperture settings are called f-stops and are represented by numbers (i.e. f/1.8, f/2, f/8, etc). The bigger the number, the smaller the lens opening.
Aperture Priority Mode is a setting on your camera that allows you to choose a specific aperture value while the camera selects a shutter speed to match. So all you need to worry about is selecting the aperture setting you like depending on how much focus or depth of field you need for your photo.
While Aperture is responsible for controlling how much amount of light passes through the lens, the Shutter Speed is responsible for controlling the length of time that the light is allowed to hit the camera's sensor or film. The shutter speed controls the amount of time that the shutter curtain is left open. The shutter speed gives you, the photographer, control over how motion is captured in your photograph. Shutter speeds that are faster than your moving subject will create a photograph of your moving subject in a 'frozen' state. Your photograph will come out with your subject very sharp and in focus and seemingly in a stopped motion. You are basically capturing a split second image of your moving subject. If, on the other hand, your shutter speed is slower than your moving subject then you will create a blurred image of your subject which generally represents a subject in motion.
The last element that contributes to a proper exposure is the ISO setting. ISO is the acronym for "International Standards Organization". In photography, ISO is an indicator of how sensitive a film or digital sensor is to light. The ISO setting determines how much light is needed for a correct exposure of your photograph.