These two images demonstrate the adjustments that can be made to a photo when using aperture priority. The image on the left shows a shallow depth of field making the girl in focus and the background blurred. It was composed using an aperture size of f/3.5 and a fast shutter speed of 1/640sec to ensure that the photo wouldn't become overexposed. The photo on the right demonstrates a great depth of field making both the girl and background in focus. It was composed using a smaller aperture size of f/7.1 and a slower shutter speed of 1/160sec to allow enough light to enter the lens. We shortened the lens to increase the distance between the girl and the camera, and emphasize the background.
Shutter Priority
These photos were captured using shutter priority. The photo on the left was composed using a fast shutter speed of 1/1000sec and a large aperture of f/5.0 so the proper amount of light entered the lens, and the pinwheel didn't have motion blur, but the background was blurred. The photo on the right shows an image made with a slow shutter speed of 1/50 and a smaller aperture size of f/22 to prevent overexposure and create motion blur around the pinwheel and a focused background. The quicker the shutter speed, the less motion blur will occur.
Manual Exposure
This is an example of an overexposed photo. An aperture size of f/3.5 was used which allowed too much light into the lens. A greater shutter speed of 1/50sec caused the photo to be exposed to the large amount of light for a prolonged amount of time creating a whited-out image.
This is an example of an underexposed photo that was taken using an aperture size of f/11 and a fast shutter speed of 1/500sec. This caused the photo to be exposed to a minimal amount of light for a short amount of time and created a photo with a darkened appearance.
This photo is an example of a desired image taken with manual settings. The aperture size of f/5.0 and the shutter speed of 1/250sec work together to properly expose the photo and compose an image that is pleasing to the eye.