DEPTH OF FIELD
The area of sharp focus is important to the appearance of the final image. The four pictures below make full use of the available Apertures on my 50mm lens. The exposure has been corrected to correspond with the Aperture I have chosen by adjusting the Shutter speed.
By doing this I can direct my focus onto any or all of the subjects I have chosen. Shooting with an Aperture of f 1.8 helps to single out one subject and make it stand out from the others, quite prominently in this case. As the Aperture is closed down the area of focus is increased.
In practice, this can be used to high-light a specific subject, for example. A couple holding hands in a crowd, A single rose in a bush of many, One particular player in a game of football or a bird amongst the foliage. Knowing how to use this function will help you master your creativity and seperate your work from others.