... consisting of a darkened chamber or box, into which light is admitted through a convex lens, forming an image of external objects ... paper or glass, etc., placed at the focus of the lens. The images are developed (development and Fixing) to the permanent ... images. Includes:Object Len Shading Film,Lens,Light tight Box,28tGear,Object Ring,Plastic cover,Knobs,Louvers 20GP 40GP ...