Professional photographers are always interested in finding the optimal file format for storing and editing their photographs. And in the past few years, more and more of them started to prefer the DNG extension.
Though when Adobe released the DNG (Digital Negative) format, in 2004, many people were skeptical about the need for an additional type of raw file when each camera manufacturer already had a typical raw extension for each brand — NEF for Nikon, ORF for Olympus, CR2 for Canon, in time the DNG format grew in popularity.