Digital SLR Camera Basics

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lens hood

An accessory that shades the lens to prevent light from the light source entering the lens directly and creating ghosting or flare.

live view

A system that displays the view through the lens “live” in the camera monitor, allowing photographs to be framed in the monitor.

long time-exposure

A photograph recorded by manually opening and closing the shutter for very slow shutter speeds. Two options are available for controlling the shutter: “bulb” and “time.” Long time-exposures are used to photograph night scenes or to create trails behind moving objects in pictures of fireworks, the night sky, or moving lights.

loss of detail in highlights

The loss of information in bright areas of the image due to overexposure. Details lost to overexposure are said to be “washed out” and appear as solid white.

See also: loss of detail in shadows

loss of detail in shadows

The loss of information in dark areas of the image due to underexposure. Details lost to underexposure appear as solid black.

See also: loss of detail in highlights

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