Graphics Programs Reference
In-Depth Information
Remote Shutter Release A device that allows the photographer to activate the shutter
release without actually touching the camera. This is one way to reduce camera shake.
Resolution A way to express the amount of detail data that an image contains. Image
quality is commonly expressed in pixels per inch, although this is not technically a correct
way to define resolution. A more accurate expression would be 4752 pixels by 3168
pixels. This is the array size of pixels in a Canon 15 Megapixel camera sensor. Each man-
ufacturer would have slightly different number for a 15 Megapixel sensor.
Sensor An electronic device which captures and records photons of light and translates
color and quantity of light data to Pixels that then form an image.
Shutter A device whose purpose is to block light from the photographic recording me-
dium except when an image is being captured. It opens and closes like the blink of an eye.
Simple Lens A single piece of glass or plastic that refracts (bends) light in such a way
that it converges to a point or diverges in a diffuse manner.
SLR (Single Lens Reflex) Camera A particular style of camera that allows the photo-
grapher to look through the lens in order to compose his image. It contains a moveable
mirror to deflect the image to the viewfinder and a Pentaprism to flip it right-side-up. SLRs
also use interchangeable lenses.
Spot Metering AE An exposure setting based on a small circle at the center of the frame
- approximately 3.5% of the total area of the frame. Often used to properly expose a per-
son's face when there is a bright background.
System Camera A camera that can be modified by changing its components.
Tilt-Shift Lens A Lens that can be Tilted or Shifted relative to the Sensor so that it
changes normal perspective. Used to eliminate normal perspective distortions that are
common in regular lenses. Performs the same function as the adjustments for the Front-
Standard in a Large-Format View Camera.
View Angle The angular expanse of the area visible through the viewfinder for a partic-
ular lens. It can be measured horizontally, vertically, or diagonally.
Viewfinder A device that allows the photographer to view and compose his image.
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