In photography, a shutter is generally used to allow light to pass for a determined period. They are also used to allow pulses of light to pass outwards in movie projector or signal lamp. Shutter speed of 1/32000 sec can be obtained. In digital cameras an image is captured by converting the light from an object into an electronic signal at the photosensitive area (photodiode) of a solid-state CCD or CMOS image sensor. The amount of signal generated by the image sensor is directly proportional to the amount of light that falls on the imager, in terms of both intensity and duration. Therefore digital cameras require some form of shutter to control exposure to the light and this is achieved by electronics shutter. Electronic shutter technology has replaced conventional, mechanical shutters in cameras and also reduced chances of blurring. Lack of noise and greater reliability are the features provided by the electronic shutter.