You have got to have a look at Justin Quinnell’s amazing Pinhole Photography. He takes pictures around the Bristol area, with exposure times of up to SIX MONTHS with absolutely fabulous results.
His work is featured in an upcoming movie called “The Brothers Bloom” starring Rachel Weisz as pinhole photographer.
Justin has plenty of tutorials on his site on how to “pinhole” and how to build your cameras too, so it’s well worth the visit.