Every year, digital cameras become more sophisticated, writes Helen Peacocke. They become cheaper, too, which is one of many reasons why virtually all photographers use them. They have certainly revolutionised modern photography. However, it is pointless owning a digital camera if you don't use it to its full potential.

Thanks to Doug Harman and photographer David Jones, who have updated their book The Digital Photography Handbook (Quercus, £6.99), help is at hand for all those who are either about to buy a digital camera or are not sure how to use the one they have.

The first part of the book guides the reader through the choice of cameras, lenses and hardware accessories on sale today and explains the technology behind them. Terms such as pixels and megapixels are explained in full, helping a prospective photographer to understand how they govern the size of the image, unravelling the complicated terminology which sounds so confusing when you obtain your first digital camera. The memory card, built-in flash and the movie and audio functions are also dealt with.

The authors go on to explain how pictures can be enhanced, discussing available light, close-up work and the art of photographing still life and moving subjects.

If you have just bought a digital camera and need a helping hand to get started, this book should answer most of your questions.