b53c7406_TAPER___Preservation_Rules__Action
[Rule Number] 7 [Description] Digital Images: .cr2, .crw, .dcr, .kdc, .nef, .orf, .pef, .raf, .srf, .x3f, and .dng [Related P&P] ACC-007 and ACC-009 [Action] 
The DCA will work with the producer of these file types to move them from their proprietary format to a standard preservation format such as .tif. It may be necessary to take the intermediate step of converting to an Adobe .dng files and then converting it to a preservation format.
TAPER - Preservation Rules
Action