I am thinking about buying a new GH4.
I currently use an "unhacked" GH2.
My biggest gripe with the GH2 is banding, especially using the 8mm fisheye. Using the fisheye i often find it difficult avoiding large light blue, white areas at the top of the frame in sunny conditions. I assume this is due to dynamic range.
How big an improvement does the GH4 have on the GH2 for sunbursts/shooting in sunny/shallow conditions.