This is the 4m class telescope (actually 4.2m) that is the host of the instrument I wish to use for my PhD. I asked someone to stand in front of the telescope to give an impression of size. You must know the telescope is about 6 to 10m behind the person and that actually it is four time bigger then the person if she was laying on the ground. Yes it is that big. What is amazing is that if the telescope turns EVERYTHING you see there and the big dome structures turns independantly.