Contax i4R User Manual
EN-191
Basic Digital Camera Glossary
AE (Auto Exposure)
Automatic exposure is the function by which the camera automatically adjusts the exposure (the shutter speed
and aperture settings) to suit the brightness of the subject.
and aperture settings) to suit the brightness of the subject.
AF (Auto Focus)
The function by which the camera automatically focuses images.
Aperture
This is a mechanism inside the camera lens that controls the amount of light passing through the lens by
changing the size of an opening.
changing the size of an opening.
Aperture setting
A number that indicates the size of the aperture opening. Settings are displayed as numbers such as F2.8, and
the higher the aperture setting, the smaller the opening and the less light that passes through the lens.
the higher the aperture setting, the smaller the opening and the less light that passes through the lens.
CCD (Charge Coupled Device)
This is a device that converts the light that enters the camera through the lens into digital information. Strictly
speaking, a CCD is a tiny component and many hundreds of thousand of CCDs are used to make up the
imaging element in a digital camera. The number of CCDs is referred to as the number of pixels. The larger the
number of pixels, the greater the amount of information generated by converting light and the higher the
resolution of the image.
speaking, a CCD is a tiny component and many hundreds of thousand of CCDs are used to make up the
imaging element in a digital camera. The number of CCDs is referred to as the number of pixels. The larger the
number of pixels, the greater the amount of information generated by converting light and the higher the
resolution of the image.
DCF (Design rule for Camera File system)
This is a standard that stipulates items such as the file formats for digital cameras and related devices. In
principle, digital cameras that conform to the DCF standard can freely exchange images, even when the
images were shot with a different brand of camera. This camera complies with the DCF standard.
• DCF is a collective mark of the Japan Electronic Industry Development Association (JEIDA).
principle, digital cameras that conform to the DCF standard can freely exchange images, even when the
images were shot with a different brand of camera. This camera complies with the DCF standard.
• DCF is a collective mark of the Japan Electronic Industry Development Association (JEIDA).
Depth of field
When a subject is in focus, the depth of field refers to the area in front of and behind the subject that is also in
focus. The depth of field increases when the aperture setting is high. Such shots are said to have a large depth
of field. Conversely, lower aperture settings give a narrow range in which objects are in focus. This is referred to
as a small depth of field. The depth of field becomes smaller when the subject is closer to the camera.
focus. The depth of field increases when the aperture setting is high. Such shots are said to have a large depth
of field. Conversely, lower aperture settings give a narrow range in which objects are in focus. This is referred to
as a small depth of field. The depth of field becomes smaller when the subject is closer to the camera.