The amazingly smooth shadows of D7k raw files
There has been some noise (oops) around here and in other internet forums about the pattern noise (straight banding) that one gets from trying to recover extreme shadows from D5200 raw files. Here is the RAW analysis of one such example (check images at original size):
So I went back to a DR test I did in late 2011 with my D7k and checked the files again. Here is one such file opened in ACR:
To see the DR of this scene, here's the RAW histogram:
As one can see, it goes above 14.5 EV (I recall I had measured it at about 16EV with the in-camera spotmeter). You can also see that there are not clipped HL, but some blacks in channels.
Now here is the same scene applying +4exp comp and 100 recovery in ACR:
Detail of the top right area at 100% (see it at original size):
One may try to find some linear banding (horizontal), but the scene is about clean.
Now here is the same area with the points where the values of the 3 channels are at or below 2 highlighted (you need to see it at original size to appreciate it).
Observe how smooth this scene is. It is at this point that the D5200 showed problems, the horizontal pattern was clearly visible there. The box is to check the typical values in this area, they are registered in the box in the middle of the top bar. Max values are in the 10-13 range and averages ae quite low. If there's any banding in the converted and recovered fie, it's not a problem with the file, but with the conversion produced by ACR.
- Canon EOS M58.8%
- Panasonic G85/G803.3%
- Panasonic FZ2500/FZ20001.9%
- Panasonic LX10/LX151.2%
- Panasonic GH5 development3.6%
- Sony a99 II15.9%
- Nikon KeyMission 170 and 801.0%
- Fujifilm GFX 50S development28.3%
- Olympus E-M1 II development18.7%
- Olympus E-PL80.1%
- Olympus 25mm F1.2 Pro1.5%
- Olympus 12-100mm F4 IS Pro1.9%
- Olympus 30mm F3.5 Macro0.1%
- Sigma 85mm F1.4 Art3.6%
- Sigma 12-24mm F4 Art2.6%
- Sigma 500mm F4 DG OS HSM Sport2.4%
- YI M12.2%
- GoPro Hero50.8%
- GoPro Karma drone2.2%