i believe #1 is the sony, because of the bokeh, it has the biggest lights in the back, that should be related to the size of the sensor right?, so bigger light spots = smaller sensor and backwards, smaller light spots = bigger sensor
#5 has the least amount of banding and macroblocking/pixelation...(looking at the background of all pics in the same place; between the right corner and the model's hair)
Well speculating will probably only make me look like an idiot, but the only thing that makes me think 2 over 5 for the gh-2 is that the hair on 5 seems has a little too much contrast.
I'd guess #2 is gh2, but really - it's incredibly difficult to tell straight up because we do not know how these are exposed in camera. (and I for one do not know how all these cameras look in respective modes) Basically, you can tell that the first image is done with a large sensor because of the short DOF / slight vignetting. I'd guess that one is the 5d, but nothing is certain. #2 looks a bit like how I would expose the scene with the gh2, hence I think it is that one. Also, the halo's from the bokeh looks familiar.
From such shots the important thing is how they grade and some looks a lot easier to work with than others.
re: bokeh / lights - he could just change the aperture in-between shots to affect them.. Even one stop will make a big difference. But #1 definately looks like a large sensor camera.
@RRRR definitely it is nice to have a great picture straight out of the camera but the more room you have in post the better. I think that is how sony gets away with selling the S-log add on for the f-3 for $3,680!
Well we now know it's either 1,2,3,or 9. Philip basically just said #5 was not the GH2.
Hmm.. what lens did he use.
lolo, #2 may be right based on it has more yellows. One thing for sure the DOF was tight since this shot appears that best focus was just a bit near her back shoulder. Take a close look, this is why this shot looks a bit soft on the face, but look at her right shoulder. It's in focus.