Natural lighting is often used in photography, as it often gives the environment and the subject a more natural look, and can be much more cost effective than using artificial lighting, as this requires specialist lights. Natural lighting can provide light to places where light would naturally occur anyway, and the same with shade, and so by using natural lighting, a photographer does not have to manipulate artificial lights to make the lighting match the effect they are attempting to show.

The products of my experience with using natural lighting with head shots (close ups). The lighting used in my experimentation came through a glass door, which the subject was positioned next to:

A negative of using natural lighting is that it can not be manipulated by the photographer to produce the best outcome. This means that when natural lighting is not available (it is overcast or there are no windows) the photograph will not have the right lighting.

The above 2 images are examples of what happens to the lighting when the sun is obstructed from coming straight through the window. These images appear more flat, and are too dark to allow the viewer to make out certain details. This damages the overall eye-catching effect of the images, and is something that cant be controlled when dealing wit natural lighting.

Natural lighting, in some cases, allowed for the subjects face to appear brighter and softer, which is an effect that may have been missed if harsher studio lights had been used. Using natural lighting with close-ups of subjects can, however, mean that some of the detail within the facial features of the subject is lost, and the positioning of the lighting and its intensity cannot be manipulated.