I was doing some testing comparing the DNG results from an iPhone XS Max and iPhone 11 Pro in regards to consistency of readings - or repeatability. What I did discover was concerning, and wondering if it may be a bug since Apple introduced new technology such as Deep Fusion.
The scenario is:
1. Take a picture of an object
2. Take a second (or more) picture of different object
3. Take a picture of the first object again, with the EXACT same conditions (camera posotion, ambient light etc..)
The DNG results are different after analyzing in photography software such as Lightroom.
The strange behavior, and why it leads me to believe this is a bug, is the following sequence produces very repeatble results:
1. Take a picture of an object
2. Take a picture of same object in exact same conditions
3. Take a picture of same object in exact same conditions
4. etc...
This is very stable. I don't see this behavior in iPhone prior to 11 and those cameras making use of the A13 chips.
The conclusion based on my testing is that DNG (or RAW) produced by iPhone 11 Pro isn't really camera raw and there is some post processing that is occuring. If anyone has encountered similiar behavior I would love to hear your feedback.
