I use an Olympus FL-36 (now FL-36R) flash with my G1. When mounted to the G1 it knows it's connected to a Four-Thirds camera and adjusts the flash angle to match the focal length setting of the zoom lens. When I put my ear to the flash I can hear the motor whirring as I zoom in or out. The flash head can be adjusted to provide bounce flash to provide more natural looking light and avoid red-eye. I bought this flash several years ago to go with my Olympus SP-350.