Camera exposure is how you determine how light or dark a image will appear when you have captured it by your camera. To achieve the correct exposure you have to have the right combination of aperture, shutter speed and iso. You can therefore use many combinations of the above three settings to accomplish the same exposure. Aperture controls the area where the light can enter the camera. The key is knowing which trade – offs to make since settings can influence other image properties. Shutter determines when the camera senser will open or close to incoming light from the camera lens. Shutter speed specifically refers how long the light is permitted to enter the camera. Shutter speed and exposure time refers to the same concept. Shutter speed is a powerful tool to freeze or exaggerate the appearance of motion. Motion blur is sometimes desirable. A camera aperture setting controls the area over which light can pass through your lens. The above F-stop numbers are all standard options in cameras. A camera aperture setting is what gathers a photo death of field. Rang of distance which objects appear in sharp focus. ISO speed determines the cameras reactivity to incoming light. ISO speed is only increased from its minimum value if desired aperture and shutter speed isn’t otherwise obtainable. Lower iso speed almost always desirable. Almost every digital cameras have one of following standardized exposure modes. Modes influence how aperture, ISO and shutter speed are chosen for a given exposure. Some modes attempted to pick all three values for you. Modes attempt to pick all three values for you. Camera may also have several pre – sets modes. Most common include landscape, portrait, sports and night modes. Most of above settings rely on cameras metering system in order to know a proper exposure. Above modes may control cameras settings which are unrelated to exposer.