Increase Your ISO
In digital photography, ISO refers to the sensitivity of your camera's light sensor. The higher the numeric value, the greater the sensor's sensitivity to light. For an indoor space with average lighting try an ISO of 400, which will produce sharp results with little noticeable noise (graininess of the image). When shooting in dimmer lighting, try upgrading to ISO 800 or 1600. Noise may be more evident in these images, but it rarely detracts from or ruins the photo. Corrections can also be made with most image editing software programs.
Use a Prime Lens
Non-zoom lenses with a fixed focal length are known as primes. Because of the simplicity of their optical construction these lenses tend to be much faster than zoom lenses, allowing for a wide range of effective apertures. One of the most popular prime lenses is the 50mm f/1.4, which allows for sharp results in even the dimmest lighting conditions. When choosing a prime, select one with the widest possible f-stop (lens opening), such as f/1.4 or f/1.7. Avoid telephoto primes (focal lengths greater than 80mm) as these allow only a few effective apertures and are better suited for use in open daylight.
Make Light Work For You
Use the light that remains to your advantage. Position subjects next to open windows and use the soft, diffused light pouring through to create flattering portraits. If you are shooting an outdoor wedding, use the warm glow of the sunset to create captivating group shots. You may also shoot toward the setting sun to make an artistic silhouette of the bride and groom. Photographs lit with an available or natural light source help to convey the intimate mood of any reception.
Bounce Your Flash
If the use of flash cannot be avoided, be sure to use a unit with an adjustable head. This will allow you to bounce the light off an overhead ceiling or reflector panel, giving the photo a softer, more diffused tone. Depending on the height of the room's ceiling, you may have to use a wider f-stop to compensate for the bounce. If you are shooting outdoors, use your camera's pop-up flash on the "Fill" setting. This produces a weakened burst of light which illuminates only your subject, preserving detail and natural light in the background of the image.