Our new classroom has windows in it but no shades. I covered them with black plastic so I could use the data projector. I added an f 176 “pinhole” (actually its a 1 1/2 inch hole but compared to the size of the room its a pinhole) to turn our classroom into a gigantic camera obscura. On a sunny day the view of the library is spectacular. Come out and experience the view that our classroom camera sees.