Walking with it connected to the camera I just feel that all that weight from the lens might just rip the mounting off of the camera. I have both a Canon EF and an AE-1 Program and with their metal parts I know it isn't going to be a problem. However with the G1, I'm just not sure as I don't think Panasonic went around testing their camera with heavy lenses. Maybe I'm just being paranoid I guess.If you're used to the nikkor 70-200 vr then the vivitar is like a feather!
Why would you not feel safe walking around with it?