OK. I've seen lego cameras, film cans, paint cans, pepsi cans and sucrets boxes. Wood, foam core and plastic. But how come I never see old box cameras converted to pinhole? It can hold 120 film, might have a shutter that sets to "B" or "T," and can be bought for the price of a pepsi can. I'm thinking of trying pinhole and wonder if I'm missing something here. Is this feasable or is it just more fun to build your own?