Glossary of Terms

Kelvin (^oK) – a standard unit of temperature measured relative to absolute zero, calculated by adding 273 to degrees Celsius or centigrade, used by photographers to measure colour temperature.

Keystoning – a term used to describe the effect of converging verticals. This is caused by the image plane not being parallel to the plane of the subject, for example, when a camera is tilted upwards to record an image of a building. The effect can be avoided by ensuring that the camera remains horizontal (for a vertical subject such as a building), and corrected using the "transform perspective" function in Photoshop or similar editing software.

Kilobyte (KB) –one thousand bytes of computer data.