Basic Exposure Techniques

Lighting plays the major role in the photographing process. This is because bad lighting will obscure the photo’s subjects and composition, leaving little to be appreciated. Good lighting, on the other hand, defines the form of your subjects and show them in vivid colors. That’s why the camera should be set to collect the correct amount of light.

Exposure is the amount of light that is collected by the photographic medium, whether it is a film or a digital sensor, while shooting a single photograph. There is no fixed value of a correct amount of light, because it depends on the available lights, the objects, and the photographer’s judgment. However, it is safe to say that there’s an acceptable exposure and an unacceptable exposure. Most exposures that obscure details while not adding any artistic value are considered unacceptable.

Low lighting conditions require high exposures to allow more light into the sensor, brightening up the final photograph. If less exposure is used, the photograph will become darker as a result of the underexposure. As for bright light conditions, low exposure will be enough to gather sufficient amount of light to produce a photo with good lighting. Otherwise, the photograph will be overexposed, having too many bright areas, the bright subjects loosing their details, and the dark subjects looking too bright..

Exposure relies on two factors: shutter speed (exposure time) and aperture. Shutter speed determines how long the sensor will be exposed to light. Slow shutter speed means more exposure, while fast speed will allow less exposure. As for aperture, it determines how wide the lens is opened. Narrow aperture will let less light pass through it than a wide aperture. ISO speeds also affect the degree of exposure. Higher ISO speeds will make the sensor more sensitive to light, reducing exposure, but it will add undesired noise to the photos.

In manual exposure mode, aperture and shutter speed are usually set independently. As for automatic exposure settings, the camera will determine the degree of exposure needed according to the light metering technique used. Exposure compensation is a method of adjusting the exposure by adding fixed exposure values, which is also very useful for camera owners who don’t have manual exposure settings.

Photographs with very dark and very bright spots will not show correct exposure on all their parts using any type of cameras. Usually, photographers take the same photograph at different exposures, and combine them together using software programs.

A good approach to learn more about exposure is to look at the exposure settings of your previous photographs, and compare them Look for the exposure time (shutter speed), the aperture, the ISO speed, and the exposure compensation in the data that is stored in your image files. As a result, you will get a clearer idea on how exposure can impact your photos.

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