Viewing Oculars: Binocular, Galilean type Magnification Change: Three steps magnification 10x, 20x, 40x Eyepieces: Wide field 10x, 15x Total Magnification -WF 10x eyepieces: 10x, 20x, 40x -WF 15x eyepieces: 15x, 30x, 60x ILLUMINATION UNIT Slit Image Rotation 0 to 180 degree Tilting Illumination 5? to 20? Filter Disc.: Cobalt Blue, Red Free, Natural Density, & Open Aperture Diaphragm for infinitely variable slit lengths Slit Diaphragm 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,15x Eyepieces, 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