The Cap40 is a print drum processor, inside the top cover there is a cup that attaches to the inside of the lid. You place the print inside and keep the tube standing up while you pour the chemistry, once you place it on it's side on the drum roller the chemistry pours from the cup onto the print. You can process LF negatives on this tube with some modifications, like adding the screen Don was talking about.
Originally Posted by larsdj
I have no idea about the Vivitar, but it sounds like a slide projector.