Ultra short throw projector; picture projectors; photographic projectors; multi-media projectors; slide projectors; LCD projectors; video projectors; home theater projectors; digital image projectors; cinematographic projectors; video projectors with a diaphragm system and memory function to memorize the lens position corresponding to each direction of the projected image; bags specially adapted for projectors; batteries for projectors; cables for projectors; slide or photograph projection apparatus; projection screens; stands adapted for projectors; lenses for projectors; photographic apparatus and instruments, namely, cameras, digital cameras, camera lenses, remote controls for projectors; cinematographic machines and apparatus; optical apparatus and instruments, namely, optical lenses, optical mirrors; measuring and testing machines and instruments, namely, digitizers; telecommunications apparatus and instruments, namely, sound recording and sound reproducing apparatus and instruments, sound projectors and amplifiers, telecommunications transmitters, telecommunications cables, portable telecommunication instant messaging devices; electronic machines, apparatus and their parts, namely, stands adapted for mobile phones; downloadable and recorded computer programs for use in image editing; downloadable and recorded image and video projection software; downloadable and recorded computer software for use with projectors for enabling high quality projection; downloadable and recorded augmented reality software for projecting 3D videos; downloadable and recorded augmented reality software for simulating the installation position and projection range of projectors; downloadable and recorded virtual reality software for simulating the installation position and projection range of projectors; downloadable and recorded computer software for simulating, analyzing, managing, controlling, operating and optimizing projectors; spectacles; eyeglasses.