See:-645D Vs K-5 Vs K-7So, now I know that why "the K-5 is what everyone needs" and that hence there is simply no meaning of the 645D at all, as the RAW IQ is just the "same"! ;-DAnd, just not to waste the remaining choice for the comparison, I selected also the K-7, which is the Pentax DSLR that scored the lowest mark as tested by the DxOLabs. The poor little K-7 really looks rather bad for this
