Have you tried to make a 'human rangefinder' I have one in my Selfix's case, I show how on my blog:
http://photo-utopia.blogspot.co.uk/2010/07/human-rangefinder.html
Thomas, this is the camera that had the light leak recently, yes? If so, it seems you got that sorted and it's a capable performer now. ...
Mathias ... Can you scale that down to about 1024 pixels wide?
Shouldn't post full Rez images like that.