I made my focusing cloth out of two pieces of inexpensive cloth I bought from the fabric store. 4' x 5', just sewed a white piece and a black piece together (by hand!) one evening while watching something typically forgettable on TV. Then I took it outside and sprayed the white side with water proofing spray. I've used it for seven or eight years now and it works fine. In the field I fold it into sixths and use it to pad my shoulder when I'm carrying the camera attached to the tripod over my shoulder.
A focusing cloth doesn't have to be light-tight, like a camera bellows. You're just making some shade to make the ground glass easier to see (you're enhancing contrast.) There's nothing special about a focusing cloth - a dark t-shirt or sweatshirt works fine (although I get the giggles every time I see someone using one -- a photographer's ass sticking out the back, the view camera poking out the front as the head, and two teats hanging down. Sorry, just the mental image is cracking me up again...
Mike
Bookmarks