Technical Specifications : BINOCULAR MICROSCOPE Microscope: Galilean type Magnification Change: Continuous Zoom Total Magnification: 10x to 50x ILLUMINATION Slit Image Rotation: 0? to 180? Tilting Illumination: 5? to 20? Filter Disc.: Cobalt Blue, Red Free, Natural Density, & Open Aperture Diaphragm for infinitely variable slit lengths. Slit Disphragm Disc: Six apertures of 12, 9, 7, 3 and 0.2mm and a wedge shaped diaphragm fo infinitely variable slit lengths Halogen Lamp: 6 Volt 20 W STANDARD ACCESSORIES Replacing Lamp one piece for illumination unit,Replacing Mirror, Hruby Lens,Testing Rod, Dust Cover and Fuse OPTIONAL ACCESSORIES: Motorized Table/Manual Table, Beam splitter module with CCD attachment, CCD Camera, Imaging System, Applanation Tonometer.