Thanks Andy, yeah it's the M8.2. I'm still trying to get the hang of it but am having a little difficulty. The photo above could've been better focused, unless it's that thing people call 'focus shift' or 'back focus', I still don't quite understand what that is. When I want to set the lens to infinity, I have to pull the focus ring back just a tiny bit for true infinity, otherwise I can see that buildings in the distance are still slightly out of focus. Maybe it's the aperture setting, I have to look into this.
But anyway in the photo above I used the high contrast shadowy underside of the bridge as the focus point.