Light indoors is often relatively dim. If you want to use the existing light and not
add flash or other light to a scene, you might have to use a slow shutter speed
and/or a wide aperture. Use a tripod at slow shutter speeds or brace your camera
against a table or other object so that camera motion during the exposure does not
blur the picture. Focus carefully, because there is very little depth of field if your lens
is set to a wide aperture. A fast film speed (ISO 400 or higher) will help