Focus

Setting the focus will help achieve the best image.

Many basic machines will not allow a change in focus, and in these machines, it is generally set to the centre of the screen. If if can be altered, however, it should be moved to the area you wish to see and you will concentrate the processing power to that area.

In the image shown, the focus is pre-set to the centre of the screen, (the line is for illustration only) and therefore the depth should be set to ensure that the area of interest is central.