Originally Posted by Paul T.
Surely not. It's shot with a higher sensitivity, but with less light shot onto it (which might further affect s/n). I don't think your statement works.
To use a film analogy, if I use faster film, but underexpose, it's still fast film. Correct me if I'm wrong.
You're not wrong. The exposure compensation affects what the camera puts the settings at, but the ISO is at what it recorded it in the Exif as. Without the exif at -1.3, depending which settings were in auto, it would have been at 1/10 a second, or it could have boosted up to iso 800 to keep the shutter and aperture settings, if it was in auto iso.
Some people are awfully opinionated for not knowing the basics of digital photography.