Leica S2 Instructions Manual page 82

S2 Firmware Update 1.0.0.24
Detailed description of changes
2 / Firmware Update 1.0.0.24
1. Extending the memory card compatibility
The memory card compatibility has been extended to 64GB
(UDMA6).
2. Lossless DNG compression
DNG (digital negative) can now be compressed lossless in line
with the DNG standard.
Compressed DNG has the following advantages:
- Reduction in file size from approx. 75MB  approx. 40MB
(depending on image content)
- More images in a sequence; around 14 images in a sequence
(depending on image content)
- Faster storage and transfer process for tethered shooting