Recommended Settings.
The correct composition:-The rule of thirds:- A simple device for getting the balance of a composition right. This breaks the picture up into a grid of nine equal rectangles. Key points of the shot are placed at one or more of the intersection, while key horizontal or vertical lines relate to the grid lines. Decide on the crop, the head or shoulder or just full-length compositions. Most popular is a three quarter length crop. Not every shot should be taken at eye level, different shooting levels can make your model look more passive or sultry. Your model doesn't need to be directly in the middle of your frame. By leaving a space, this can give a better artistic balance in composition.
Focus & metering.
By focusing on the models eyes is the most important aspect to taking a portrait. Choose the AF in single shot mode and use a single AF point, then focus on the models eyes before reframing to get the correct crop required. To achieve perfect exposure, choose multi-segment metering. In the case when there is extreme backlighting. It would be better to switch to spot metering and take a reading off the models face.

Taking that professional picture.
Dark backgrounds may cause overexposure, while light backgrounds can cause an underexposure. Dark skin tones can cause overexposure, while pale skin may result in underexposure. A high ISO can cause noise and colour shifts that will spoil sensitive skin tones. In cases where there is three or four models in one frame. Take multiple exposures and check that everyone is in focus and that there is no distortions near the outer edges. If your camera has A-Dep mode use it.

Time to take professional images.
With the correct settings, viewpoint, composition and lens choice. You will be able to spend more time to encourage the model to pose to your requirements. By previewing the image on your digital camera LCD screen you will be able to verify if it is too dark or light. Manipulate the exposure compensation or up the ISO and repeat until you achieve the correct end result.
©Glamour Photo OnLine 2002