I've recently been thinking about purchasing the Holga 120-3D Stereo Camera. There are a couple of questions that I have about the camera if anybody know it would be helpful to me. I'm assuming that it takes slide film since the positive is what you use to put into the view finder. But what slide film can be processed at like a walgreens or target any commercial developer, our school doesn't have the chemicals for developing color film. Is there any B&W slide film?