InfraRed (IR)

InfraRed (IR) This is a portion of invisible light in the total light spectrum. In active auto-focus function, your camera will bounce an infrared beam off a subject to read an accurate focus point. Infrared can also be used to transfer data from your camera to a computer, without a cable.


Interlaced This describes how an image sensor processes the data of any image by collecting the odd lines and then the even lines.


Intervalometer This function is part of most better quality remote shutter releases. It allows you to preset multiple points in time when you want the shutter to release during time-lapse photography. The intervalometer then trips the shutter automatically.


ISO ISO is a range of numbers that represents the light sensitivity of your digital camera's sensor. (ISO is an acronym for International Organization for Standardization, which sets those numerical values.) ISO is digital photography's equivalent of the ASA numbers in film-based photography. The...


JPEG, JPG This is an acronym for Joint Photographic Experts Group. This is a technical committee that developed JPEG, which is a lossy compression format and the one found in most digital cameras.


Kelvin Named after a Scots scientist of the 19th century, the Kelvin scale is another way to measure temperature like Fahrenheit or Celsius. Light consists of various colors, as you can see when light passes through a prism. The Kelvin scale measures the light in terms of whether it trends toward the...

Key Light

Key Light This also known as the main light in the three-point lighting concept that is used for portrait photos. Typically, the key light is placed at a 45-degree angle to and slightly above your subject to create more dimension and depth, with just enough shadows.

Kilobyte (KB)

Kilobyte (KB) One kilobyte equals approximately 1,000 bytes of stored data (photos, video, words, art, etc.) 'Kilo' comes from the Greek word, chilioi, meaning one thousand.