OWL Stereoscopic Viewer with or without Xreal adapter

Owl Viewer now adapters for Xreal Available! The OWL, designed by Queen Guitarist Brian May, is a unique, high quality, stereo focusing viewer, which packs into a space only 1/3 inch thick, yet assembles in 15 seconds into a rigid precision instrument which is equally at home sitting on a page to view stereo illustrations in a book, or used in the hand as the perfect viewer for stereo cards - classic or modern.  It has extra large lenses so anyone can use it regardless of eye spacing.  It has a slot to hold views in the viewer or since the back has an opening it can be placed over a stereo image in a book for high quality viewing.   The new version of the OWL features a wider aperture in the back plate - as suggested by Stereo World editor John Dennis.  This makes no difference to the OWL's performance in viewing stereo cards, but it enables the viewer to cover the whole area of larger format cards when they are illustrated life-size in book and magazines.  Usually these are cards mad