SNT #1: Shutter Priority & Aperture Priority
Shutter priorty (Tv) is an exposure mode on a camera that lets you select the desired shutter speed, leaving the electronic processor in the camera to calculate the aperture for proper exposure. The aperture is adjusted automatically when the amount of light changes or when the shutter duration is changed. Shutter priorty is usually used to achieved the blurring water effect on rivers and waterfalls using longer shutter speeds, or to freeze subjects in action scenes using short shutter speeds.
Aperture priority (Av) lets you select the aperture and the camera automatically selects the shutter speed. The aperture is an opening in the lense that allows light into the camera sensor, and is varied by changing the size of the opening. Aperture priority mode is used when you want to control depth-of-field (DOF).
Aperture priority (Av) lets you select the aperture and the camera automatically selects the shutter speed. The aperture is an opening in the lense that allows light into the camera sensor, and is varied by changing the size of the opening. Aperture priority mode is used when you want to control depth-of-field (DOF).
