Infinity Optical System (10S) with C shaped, corrosion resistant, Anti Fungus treated, single mould modular stand. 30° Inclined Siedentopf Trinocular tube, 360° rotatable, IPD 48-75 mm with dioptric adjustment and 30° Inclined Siedentopf Binocular tubes, 360° rotatable, IPD 48-75 mm with dioptric adjustment, 4 heads