Viewing Head : Trinocular Head Eye Piece : Extra Wide Field Eyepiece EW10X/22 Objective : INFINITIVE PLAN Achromatic Objective 4X/0.1 WD25.4 mm 10X/0.25 WD11 mm 20X/0.4 WD6 mm 40X/0.6 WD3.7 mm Nose Piece : Quadruple Nosepiece Mech. Stage : Size 300mmx268mm, Movement 250mm x 250mm Focusing : Coaxial Course and Fine Adjustable, Range 24mm Illumination : 200V or 110V/6V20W Halogen Lamp, Brightness Adjustable Filter : Blue, Green, Yellow, Ground Glass