Aperture
The adjustable opening—or f-stop—of a lens determines how much light passes through the lens on its way to the film plane, or nowadays, to the surface of the camera's imaging sensor. “Faster” lenses have wider apertures, which in turn allow for faster shutter speeds. The wider the aperture is set, the shallower the depth of field of the image.
Color Space
The range of colors that can be reproduced on a computer monitor or in print. The most commonly used color spaces for digital imaging are the baseline sRGB and wider-gamut Adobe RGB (1998).
Depth of Field (DOF)
Literally, the measure of how much of the background and foreground area before and beyond your subject is in focus. Depth of field is increased by stopping the lens down to smaller apertures. Conversely, opening the lens to a wider aperture narrows the depth of field.
Digital Zoom
Unlike an optical zoom, which is an optically lossless function of the camera’s zoom lens, digital zoom takes the central portion of a digital image and crops into it to achieve the effect of a zoom. This means that the existing data is not enhanced or added to, merely displayed at a lower resolution, thereby giving an illusion of an enlarged image.
Exposure
Exposure is the phenomenon of light striking the surface of film or digital imaging sensor. The exposure is determined by the volume of light passing through the lens aperture (f/stop) combined with the duration of the exposure (shutter speed).
ISO (International Standards Organization)
Film speed rating expressed as a number indicating an image sensor’s (or film's) sensitivity to light. The higher the number, the more sensitive and faster the sensor (or film) is. Although traditional cameras don't have a specific ISO rating, digital cameras do as a way to calibrate their sensitivity to light. ISO is equivalent to the older ASA.
Shutter
A mechanism in the camera that controls the duration of transmission the light that reaches the film or sensor.
The adjustable opening—or f-stop—of a lens determines how much light passes through the lens on its way to the film plane, or nowadays, to the surface of the camera's imaging sensor. “Faster” lenses have wider apertures, which in turn allow for faster shutter speeds. The wider the aperture is set, the shallower the depth of field of the image.
Color Space
The range of colors that can be reproduced on a computer monitor or in print. The most commonly used color spaces for digital imaging are the baseline sRGB and wider-gamut Adobe RGB (1998).
Depth of Field (DOF)
Literally, the measure of how much of the background and foreground area before and beyond your subject is in focus. Depth of field is increased by stopping the lens down to smaller apertures. Conversely, opening the lens to a wider aperture narrows the depth of field.
Digital Zoom
Unlike an optical zoom, which is an optically lossless function of the camera’s zoom lens, digital zoom takes the central portion of a digital image and crops into it to achieve the effect of a zoom. This means that the existing data is not enhanced or added to, merely displayed at a lower resolution, thereby giving an illusion of an enlarged image.
Exposure
Exposure is the phenomenon of light striking the surface of film or digital imaging sensor. The exposure is determined by the volume of light passing through the lens aperture (f/stop) combined with the duration of the exposure (shutter speed).
ISO (International Standards Organization)
Film speed rating expressed as a number indicating an image sensor’s (or film's) sensitivity to light. The higher the number, the more sensitive and faster the sensor (or film) is. Although traditional cameras don't have a specific ISO rating, digital cameras do as a way to calibrate their sensitivity to light. ISO is equivalent to the older ASA.
Shutter
A mechanism in the camera that controls the duration of transmission the light that reaches the film or sensor.