One of the more interesting features of the Nokia Black update is the ability to capture photographs in RAW or DNG format. DSLR and high-end compact cameras have been using the RAW/DNG format for years and this is the first time a smartphone has had this ability.
The DNG format allows Lumia 1020 and 1520 camera users more control over their images. It is a feature that matches up well with the optical stabilization, low-light performance and larger imaging sensors already in place.
However, DNG may not be for everyone. If you detest post-processing (photo editing) and prefer a “straight from the camera” photography experience, you may want to stick with JPEG.