Digital Index. Coding on the film cartridges used to transmit information in relation to film speed, the length of film and the exposure latitude to the camera. Most films - except some technical films are DX coded - means you need not to worry about wrong setting of the ISO setting of film speed anymore, reducing chances of mistakes. Common speed ... Found on http://www.rodsmith.org.uk/photographic%20glossary/rods%20photographic%20gl
Nikon Digital format lenses. Nikon Digital SLRs have CCDs smaller than the area of a 35mm film frame therefore DX lenses will cause vignetting if used on a 35mm film camera. (see Vignetting)
Found on https://www.encyclo.co.uk/local/20176