pin hole cameras

This is the first time Iv tried using a pin hole cam and I have to say I was quite impressed with it, who knew a beer can could be more useful then I thought. I think the bast part of it is when you develop your images as you never know what they are going end up like. I tried diffrent exposer times and realised that the longer I exposed it to light the better the contrast appeared on the final photo. Another thing I learnt was that its best to keep it on a flat surface as this stops the image form blurring.