The users have
to grab a technique where he or she has to depress this shutter release button half way down
thereby locking both the auto exposure and auto focus. This enables the users or photographers to
have more control on exposure in difficult lighting situations while using the digital camera.
Moreover, this entire process also helps him or her to determine where the camera focuses. Like if
the photographer intends to set the exposure before composing the final shot of the photograph
then he or she can move the digital camera slightly so that only the subject to be photographed is
visible prominently in the auto focus frame in the viewfinder. As a next step he or she can depress
the shutter-release button down half way to set focus and exposure and then recompose the
picture and finally completely depress the button in order to capture and freeze the moment of
time! It is to be noted here that the auto focus and auto exposure lock (AE/AF) is available in all
photography modes of the digital cameras that are nowadays available for the general people.