When I recently purchased a G7, my primary reason was to have a backup body to my aging GH2. There are many new benefits that the G7 brings to the party, but the one I wasn't really looking for but really appreciate is the G7's higher ISO abilities. With the GH2, I kept the ISO to 320 or below unless I really needed the light. With the G7 I'm finding that I can go to 3200 without much worry. This is a three stop improvement (over the GH2 base ISO of 160). The ability to increase shutter speed along with the improved manual focusing tools - PIP and peaking - got me thinking about trying out an old Takumar 300/f6.3 lens that I have. With the GH2 this lens was almost impossible to focus and always too slow for hand-held or even braced use. Attached are two screen shots from Lightroom comparing base ISO 200 to ISO 1600 and 3200. All of the shots are processed for noise and sharpened. Admittedly, the old Takumar is a soft lens, so these are not as crisp as you might expect. Still, at ISO 1600 there is essentially no loss of image quality and at 3200 it is minimal. That's a big bonus! All shots were taken with the camera braced, but not tripod mounted, using the electronic shutter.