iSight is a webcam, both external and internal, developed and marketed by Apple Inc. The external iSight retailed for US$149, it connected to a computer via a FireWire cable, and came with a set of mounts to place it atop any then current Apple display, laptop computer, all-in-one desktop computer, or flat surface.
Apple introduced iSight at the 2003 Worldwide Developers Conference, It was intended to be used with iChat AV, Apple's video-conferencing client. iMovie (version 4 and later) could also be used to capture video from the device. In April 2005, Apple released a firmware update for the iSight to improve audio performance. As of December 16, 2006, the external iSight was no longer for sale in the Apple online store or in retail locations.
Meanwhile, Apple began using the term to refer to the camera built into Apple's iMac, MacBook, MacBook Air, and MacBook Pro computers, and Cinema Display. In November 2010, Apple began calling them " FaceTime cameras". However, the term was not retired, as the third-generation iPad, the fifth-generation iPod Touch, the iPhone 6S, the iPhone 6, the iPhone SE, the iPhone 5S, the iPhone 5C, iPhone 5, the iPhone 4S, and the iPhone 4 all incorporate an “iSight” rear camera in addition to a front-facing “FaceTime” or “FaceTime HD” camera.