(A) To properly bring the subject into focus.
(B) To balance the colours.
(C) To sharpen the background.
(D) To soften and enlarge the subject.
For the majority of people, including myself, photography is mostly used for documentation or record-keeping. It’s about snapping a snapshot in the hopes of capturing a fleeting moment and performing a little protest against the dictatorship of time. That’s why, in the past, we’ve photographed at what you might consider to be rare moments. Scanning is easier, quicker, and more accurate than photo copying with a camera. The only exception is if the picture has a surface texture (such as silk) that needs offset lighting to resolve.