>It appears to me that your camera is broken. Either your >flash or Auto ISO isn't working properly. If it was, the photo >at ISO 100 and f1.8 would be exposed properly even if the Auto >ISO over ride was working. Take another photo. Turn Auto ISO >off, set ISO to 100 and your lens to f1.8 and use flash. If >the exposure is now correct then what was done before was a >fault. > >Len > >
It's a possibility that camera is broken. I cannot do full research at work computer, but both images taken in manual mode. The two images are 4 seconds apart. That was enough time for flash to recharge. The dark image was taken first and i suspect flash was not recharged (either just turned on or continues shooting mode was used). I cannot see the actual ISO imbedded to EXIF at work, so I cannot say if images were titles correctly (e.g. ISO 100 and ISO 12.800)
Also flash was used but returned light was not detected – not sure what it means – flash was in manual mode as well?