Hi folks, If you are interested in learning how to make a giant camera obscura I have just placed a new page on my site with easy to follow instructions and lots of activities (especially good for teachers). If you have not done this you're in for a real treat! If you have done this you'll probably find something new here.
www.paintcancamera.com click on 'A Giant Camera' at the upper left of the page Have fun! Jim K
