With D4s camera Nikon introduced the new file format they refer to as RAW Size S NEF:
- It contains not RGB but YCbCr data much like a JPEG;
- The data is 11-bit;
- The tone curve is applied to the data;
- The in-camera white balance is applied to the data;
- The pixel count is 4 times less than with regular NEF files;
- The color information is shared between two adjacent pixels (in other words, chroma is recorded for each other pixel);
- The file size is insignificantly smaller than full resolution 12-bit lossy compressed NEF;
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