So, I recently purchased a GX1 (with the 14-42mm kit lens) and now I'm ready to explore the capabilities of the camera. Decided to turn off IA and start with Aperture Priority. When I looked for the f-stops on the lens barrel, of course, I didn't see any. Referred to the manual to discover that I would need to use the wheel to change f-stops. I'm a bit confused, however. since as i turn the wheel I see a number line with positive and negative settings before I see the f-stops begin to change. The manual doesn't seem to offer much help. Can anyone describe what's going on here?