I went to an event with two cameras, the Olympus E-PL1 with Panasonic 20mm f/1.7 lens and the Canon 7D,with the EFS 17-55 f/2.8 lens and a Canon 430ex flash which could be used on either camera. I hadn't been to the venue, an activity center, so I didn't know what the lighting would be. It was fluorescent lit, with the fixtures being in a very high ceiling. Wound up using the E-PL1 for all images and no flash. I was very, very pleased with the images, which required next to no post-processing. Color was terrific (camera was set to auto white balance.