Reference

Basic Photography Terms

Exposure

Exposure occurs when the film is exposed to light. Correct exposure is obtained when the film is exposed to a proper amount of light in accordance with the film’s sensitivity to light. The correct exposure is adjusted with the camera’s shutter speed and lens aperture.

Shutter speed

The shutter speed is the length of time the camera’s shutter opens to expose the film to the light coming through the lens. The shutter speed is displayed on the camera’s LCD panel and in the viewfinder. It ranges from 1/2000 sec. to 30 sec. and bulb.

Aperture

The aperture setting (f/number) indicates the size of the aperture opening in the lens (focal length/aperture diameter). It is used to adjust the amount of light striking the film. The aperture setting is displayed on the camera’s LCD panel and in the viewfinder. It can range anywhere from 1.0 to 91, depending on the lens attached to the camera.

ISO film speed

The ISO film speed indicates the film’s sensitivity to light. The higher the film speed, the more sensitive the film is. Therefore, ISO 400 and higher -speed films are suited for low-light conditions. The ISO film speed is set in accordance with standards set by the International Standardization Organization (ISO). A film speed from 6 to 6400 can be displayed on the LCD panel.

Depth of field

This is the range where acceptable focus can be achieved in front of and behind the point of optimum focus. The smaller the aperture (the larger the f/number), the deeper the depth of field. And the larger the aperture (the smaller the f/number), the shallower the depth of field.

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