Adapter rings for attaching objectives on cameras; Bicycle speedometers; Camera lens adapters; Conversion lenses for cameras; Digital video cameras; Electrical circuit boards; Electronic data loggers; Lens shutters; Lenses for cameras; Mounting devices for cameras and monitors; Optical apparatus and instruments, namely, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for underwater photography; Photographic cameras; Shutter release...