I have always seen these in hobby books and sites. Never really got my hands dirty with it though. Found these on a sub Corbis website. Corbis is a stock image+illustration+footage website. The cameras they offers are designed exclusively with images and illustrations available in their media warehouse. Currently they have 5 designs (Peyote, Photos of Your Mother, Doctor Livingstone, Astrocam and Pablo) but only 3 are with complete download at blog publish time. The PDF file is quite detailed and informative.
Any of you tried making one before?
My fave design is the Pablo.
The result… a bit grainy dreamy feel huh…