Grand Parlor Stereoscope Graphoscope Graphoscope Negretti & Zambra Great Exhibition of 1851 Ground glass Guérin, Émile Half-stereo Hanau, Eugène Hand-held stereoscope Hand-Stereobetrachter Ernemann Hautecoeur Heidoplast Helioplast Hemdé Hermagis Hildenbrand, Hans Hinged lid Hodent, Louis Joseph Holmes-Bates stereoscope Holmes, Oliver Wendell Sr. Homéos pliant de poche Homéos stereoscope Homéoscope Hyalotype Hyperstereo Idealoskop Image distortion Imperial Indupor Indupor Taschen-Stereoskop Inter-ocular adjustment Internationale Camera AG Iris