This survey is about DNGs, or more precisely about compressed DNGs:
DNG files store photos in particularly high quality and offer a lot of scope for post-processing - but they require a lot of storage space.
The lossless compression of DNGs reduces the file size without losing image information (as with a ZIP file). Many camera manufacturers take this approach; at Leica, the format is available from the Leica M11, Leica SL3 and Leica Q3 onwards.
Lossless compression saves storage space and makes archiving easier, but requires more processing power and can affect speed and energy consumption.
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