The color, direction, quantity, and quality of the light you use determines how your subjects appear.
Outdoor Lighting
Changing daylight can alter the apparent shapes, colors, tones, and forms of a scene. The color of sunlight changes most rapidly at the beginning and end of the day. Strong color changes also occur during storms, haze, or mist and on blue wintery days.
Strong, direct sunlight is “hard” because it produces dark, well-defined shadows and brilliant highlights, with strong modeling of form. Sunlight is hardest on clear summer days at noon. Strong sunlight makes strong colors more brilliant, but weak colors pale.
Sunlight is diffused by haze, mist, and pollution in the air. This diffused or reflected light is softer; it produces weak, soft shadows and dull highlights. Directionless, diffused sunlight is often called “flat” lighting because it produces fine detail but subdues or flattens form. Weak, directionless sunlight provides vibrant, well-saturated colors.
Frontlighting
This is the type of lighting produced when the light is on the front of the subject and behind the photographer. Over the shoulder lighting produces a flattened effect, doing nothing to bring out detail or provide an impression of depth. The human eye sees in three dimensions and can compensate for poor lighting. A photograph is only two-dimensional; therefore, to give an impression of form, depth, and texture to the subject, you should ideally have the light come from the side or at least at an angle.
Side Lighting
Interesting effects can be achieved by changing the angle of the light falling on your subject. As you turn your subject, change the camera viewpoint, or wait for the sun to move, the light falls more on one side, and more shadows are cast on the opposite side of the subject. For pictures in which rendering texture is important, side lighting is ideal. Pictures made with side lighting usually have harsh shadows and are contrasty. To lighten the shadows and reduce the contrast, you may want to use some type of reflector to direct additional skylight into the shadow areas or use fill-in flash, whichever is more convenient.
Backlighting
When the sun is in front of the photographer, coming directly at the camera, you have what is referred to as backlighting; that is, the subject is backlit. This type of lighting can be very effective for pictures of people outdoors in bright sunlight. In bright sunlight, when subjects are front-lighted or even sidelighted, they may be uncomfortable and squint their eyes. Backlighting helps to eliminate this problem. Backlighting may also require the use of a reflector or fill-in flash to brighten up the dark shadows and improve subject detail. Backlighting is also used to produce a silhouette effect. When you use backlighting, avoid having the sun rays fall directly on the lens (except for special effects). A lens hood or some other means of shading the lens should be used to prevent lens flare.
Existing Light
Existing light photography, sometimes called available or natural light photography, is the making of pictures by the light that happens to be on the scene. Photography by existing light produces pictures that look natural. Pictures made indoors by existing daylight are pleasing to the viewer, because of the soft diffused light and the squint-free expression of your subjects. Open all the window drapes in the room to get the largest amount of light possible. Pose your subject to allow the daylight to fall on the front or side of their face.Try not to pose your subject in a position where too much of the facial features are in shadow, unless you are trying for a special effect, such as a silhouette.
Fluorescent Lighting
Most color pictures made without a filter under fluorescent light have an overall greenish appearance. Used correctly, fluorescent light has some advantages over other types of available light. A room illuminated by fluorescent lamps is usually brighter and more evenly lighted than a room illuminated by tungsten lamps. This higher level of light makes it easier to get enough exposure for your existing light photography and helps record detail that may have been lost in the shadow areas with other types of existing light. When photographing people, however, fluorescent lighting often causes dark shadows under the subject’s eyes. These shadows cause the eyes to appear dark and sunk in.
Pictures Outdoors at Night
Outdoor night scenes usually include large areas of darkness broken by smaller areas of light from buildings, signs, and streetlights.
Many buildings look rather ordinary in daylight, but at night, they are often interestingly lighted.