The LEITZ SECOLUX 6×6 Upright Stereoscope is a used optical instrument designed for detailed stereoscopic viewing of aerial photographs, transparencies, and technical imagery. Built with Leitz’s renowned precision optics, this tabletop stereoscope provides clear, high-contrast three-dimensional visualization, making it ideal for cartography, photogrammetry, geology, and other professional image analysis applications. The 6×6 format accommodates large transparencies and contact prints, while its ergonomic upright viewing design allows for extended, comfortable use.