Bit Tech has written a guide with tips on taking better photographs of your PC or case mod, you can check it out over here.
Taking photos in low light or close up can often lead to poor results. Even expensive Digital SLR cameras have an auto mode but it won't always give you the result you're looking for. In some cases, the end product can be quite disappointing. If you haven't ventured away from the auto mode on your camera, it's well worth delving a little deeper.
A few seconds of work here - if you know what you're doing - can make all the difference. This guide suggests some basic tips and tricks most of which cost nothing, enabling you to take better photos of your PC.