by Donald Ray Burger
Attorney at Law
Av: Canon's term for aperture priority.
B & W: Black and white images.
Blinkies: A flashing in the LCD indicating over exposed area (which will be washed out).
Bulb: A shutter speed in which the shutter stays open as long as you hold the shutter release button down.
Burst Mode: The mode in which the camera continues to shoot so long as the shutter release button is pushed down.
CCD: Charge coupled device. A type of light sensitive silicon chip.
CILC: Compact Interchangeable lens Camera.
CMOS: Complementary Metal Oxide Semiconductor. A type of light sensitive silicon chip.
CMYK: Cyan, Magenta, Yellow and Black. The primary colors of ink, plus black (K).
Depth of Field: The distance in sharp focus in front of and behind your chosen point of focus.
dSLR: Digital Single Lens Reflex. A camera type where you view the scene through the same lens that allows the light to reach the silicon chip. This is accomplished by the use of mirrors to reflect the light. The mirrors move out of the way when you click the shutter.
Fast Lens: A lens with a large maximum aperture, which will let light in faster.
F-stop: The ratio of the focal length of the lens to the area of the aperture. Conventional f-stops are 2.8, 4, 5.6, 8, 11, 16, 22 and 32.
Glass: A camera lens.
Histogram: A graphic representation of exposure of an image. Spikes touching the righ edge mean overexposure. Spikes touching the left edge mean areas of pur black with no details.
ISO: International Standards Organization. Also, their standard for measuring sensitivity of film or silicon chips. Digital camera makers have adopted this standard. It is equivalent to the 35 mm film speed.
LCD: Liquid crystal display.
Noise: The digital equivalent to grainess in film.
Opening Up the Lens: Selecting a larger aperture (f/8 instead of f/11).
Overexposed: Too much light (washed out).
Pixels: Picture elements.
JPEG: Joint Photographic Experts Group.
Rear Sync: This causes the flash to fire at the end of the shutter speed instead of the beginning. In turn, this lets the background get some light and then the flash fires to properly expose the subject.
RGB Image: an image using red, green and blue (the primary colors of light).
SDHC: Secure Digital High Capacity. A type of flash card.
Shooting Full Wide: Selecting the largest aperture on your particular lens.
Shooting Tethered: Using a USB cord to go from the camera to a laptop or monitor. Software is required. The needed software is included in Lightroom. It is also on the EOS software that comes with a Canon dSLR.
Shutter: A two curtain system used to control the amount of light that hits the film or sensor. One curtain opens and one curtain closes.
SLR: Single Lens Reflex. A camera type where you view the scene through the same lens that allows the light to reach the film. This is accomplished by the use of mirrors to reflect the light. The mirrors move out of the way when you click the shutter.
Stop: A measure of the amount of light. Each doubling of the amount of light increases the stop by one stop. Stops can be f/stops, shutter speeds or ISO.
Stopping Down: Selecting a smaller aperture.
Tv: Canon's term for shutter priority.
UDMA: Ultra Direct Memory Access.
Underexposed: Not enough light (too dark).
Zone System: A technique for dealing with exposure developed by Fred Archer and Ansel Adams in 1940.
Created February 29, 2012
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