This is about as basic a question as possible, but I'm new to this and there are lots of things I'm trying to figure out. So: On my GX1 I have a 14-42 lens. I can use the zoom wheel (or whatever it's called -- the bezel on the lens) to extend the lens, but I can also pull on the end of the lens, which is a bit faster if I want to zoom all the way in. But I suspect that pulling on the end of the lens is not necessarily the best way to zoom. It probably puts more torsional stress on the internal components of the lens. Or maybe pulling on the end of the lens is perfectly OK. I'm really not sure, and I don't want to damage the lens or shorten its life. Suggestions and feedback most welcome.