In 1975, Steven Sasson developed Kodak's first prototype digital still camera, which used a Fairchild 100 x 100 pixel CCD.
The DCS 200 series, introduced in 1992, condenses the storage unit into a module which is mounted onto the base and back of a stock Nikon 8008 SLR film camera.
It was followed by the upgraded DCS 400 series of 1994, which replaces the hard drive with a PCMCIA card slot.
With the exception of the original DCS 100, these early models do not include LCD preview screens.
Kodak's subsequent models integrate the digital module with the camera body more thoroughly, and include LCD preview screens and removable batteries.
The DCS 600 range includes the Kodak DCS 620x, a high-sensitivity model with an upgraded indium tin oxide sensor and a cyan-magenta-yellow Bayer filter, which has a then-unique top ISO setting of ISO 6400.
These two cameras are based on a Nikon F80 body, and are considerably more compact than previous Kodaks.