Lighting your subject
When the camera is close to the subject, it can block the light. Using the built-in flash is not always effective – it is off to one side from the lens and coverage at close distances can be uneven.
If you don’t have a separate Speedlite flash, then a light bulb in a reflector such as a desk lamp provides good lighting for indoor subjects. A white card reflector is useful for controlling the shadows. Remember to adjust the camera’s white balance setting to ‘tungsten’. Alternatively, window light, especially from a north-facing window on a bright day, is equally effective.
For serious macro lighting with an EOS camera, then the Macro Ring Lite MR-14EX or Macro Twin Lite MT-24EX, are specifically designed for close-up work. These electronic flash units fit around the camera lens.