Hey, did you call Samsung and asked them for an answer? Or you just post what you found from your computer and hope 01 users would give you answer?
Or, maybe you want some support from 01 users? Well, I will support you since you have shown an example of light colored photo. From what I can see, that COULD be a "defective" sensor...... now that is a big problem. If your ex1 has the defective sensor then it is still useless even if they give you F1.4, dont you think?
I strongly suspect your ex1 has a defective sensor, if this camara is purchased within 7 days then please do take the camara to your camara dealer and ask them for a full refound or exchange of ex1.
Good luck, and wish my ex1 does not have the same problem like yours.