A large format camera? Yes, made from a dumpster!

The guys from the Hamburg sanitation service got this idea and it turned out to be a big success! The "camera" accepts paper negatives as large as 0.8x1meter which are then developed afterwards. The negatives are contact-copied onto another big sheet of photo paper and voila, the final print is made! Obviously, the whole thing to manage is a bit more cumbersome, due to the dimensions...

One of the final pinhole prints exhibited.
Copyright: Werner Bünning/ Stadtreinigung Hamburg/ Scholz & Friends

The advertising campaign they made with these large pinhole cameras earned them the Silver Lion award at the Cannes Lions advertising festival. The only thing I am not sure, however, is the pinhole diameter: they state they used an 8 mm "lens", but it's more likely it was a 0.8 mm pinhole (probably a typo). Link to the original article is here.

Mitja