I do a lot of natural lighting photography, but once in a while, I really need a flash. I have an Olympus FL-36 to use with my GH2 and have had very good success with the following settings: Camera: Manual Mode, ISO 320, f2.2-3.5, shutter 1/100 Flash: Auto (not Auto-TTL) - aimed at the ceiling with a white card behind the flash This combination works very will with the 20mm lens and I've purchased a low cost grip since, with the weight of the flash and the small lens, there really isn't enough camera to hang onto. I learned an interesting fact on the way to finding these settings. The flash in Auto mode recharges much faster than in TTL-Auto mode. In TTL-Auto, the typical recharge time is around 10-15 seconds. In Auto mode, with the subject at the same distance, the recharge time is about 1-5 seconds. Using Auto mode on the flash and fixed Manual mode on the camera yields very consistent good exposure. The height of the ceiling and other factors may require some adjustment, but once the flash is dialed into the room, the results are good across a reasonably broad range, say 2 to 15 feet more or less. Another trick I've learned is how to zoom my 20mm lens. I normally shoot with the eye viewfinder, but if I need a bit of zoom, simply extend the camera out arm's length and use the panel display. With subjects that are pretty close to begin with, this works nicely.