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HDR Photography Photo Workshop by Robert Correll, Pete Carr

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GLOSSARY

AEB

Auto Exposure Bracketing is a camera feature that automatically adjusts the exposure for a series of photos, resulting in a set of at least three photos. Cameras differ in how much exposure compensation they offer per bracket. Some are +/-2EV per bracket (-2/0/+2EV) while others are less.

aperture

Aperture describes the size of the opening in the lens that focuses light past the open shutter and onto the sensor inside the camera. A larger opening lets more light in and a smaller opening permits less light in. Aperture is expressed as an f-number, the number of which works opposite the aperture size. In other words, a small f-number such as f/2.8 is a larger aperture than a large f-number such as f/8.

Aperture Priority

This mode locks the aperture to your chosen setting but allows the camera to modify shutter speed to get the best exposure.

bokeh

The blurred area, most often perceived as behind the focal plane, that is not in the depth of field for a given lens and aperture and therefore not in focus. Not all lenses produce equally aesthetic bokeh. Some produce double images while others are very pleasing. See also aperture and depth of field.

bit depth

A measure of how many binary digits (bits, which can be 0 or 1) are used to record or store data in a digital system or file. More bits allow larger numbers. For example, one 8-bit channel of an RGB image can store 256 values for color intensity while a 16-bit-per-channel TIFF image can store 65,536 values per channel.

blown highs ...

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