Digital SLR Camera Basics



An abbreviation of “High Definition Multimedia Interface,” an input/output standard for digital images and audio.


One of the brightest parts of an image.


A graph showing the distribution of pixels of different brightnesses (tones) in an image. The horizontal axis corresponds to brightness, the vertical axis to the number of pixels. If the image contains objects with a range of brightnesses, the distribution of tones in the graph will be relatively even. If the image is dark, the distribution will be shifted to the left, or to the right if the image is bright. Increasing exposure compensation shifts the distribution of tones to the right, while decreasing exposure compensation shifts the distribution to the left. Histograms can provide a rough idea of overall exposure when bright ambient lighting makes it difficult to see photographs in the monitor.


The property that defines the difference between colors such as “red” and “yellow.” The hue adjustment available with digital cameras can be used to make reds more yellow or purple, yellows more green or red, greens more blue or yellow, blues more green or purple, and purples more blue or red.