Overdoing it - FZ200
A shadow of the lens with an on camera flash? You won't get a shadow using the popup flash unless you have the hood on and at wide end. I can't imagine how did you get a shadow using such Flash gun. Were it pointing downwards? And un a wide angle setting while shooting at some tele?
Be aware of Gear Acquisition Syndrome...just in case. ...
Post a photo to see how did you get the shadow .