Blur is unsharp image areas, created or caused by subject or camera movement, or by selective or inaccurate focusing. Boom is an adjustable metal arm, attached to a firm stand, on which lighting can be mounted. Some booms are also made to support cameras. Bracketing is the technique of shooting a number of pictures of the same subject and viewpoint at different levels of exposure. Brightness range is a subjective term describing the difference in illumination between the darkest and lightest areas of the subject.
Brilliance is the intensity of light reflected from a surface.
It is sometimes an alternative term for luminosity . Built-in meter is a a reflective light meter built directly into the camera so that exposures can be easily made for the cameras position. Bulk film is film purchased in long lengths. Used in a bulk camera back or with a bulk film loader. Burning in See Printing-in .