45mm DIN achromatic objective: 4x, 10x, 40x (s), 100x (s, oil) Wide field plane-scope eyepiece: WF10x Total magnification: 40x-1000x Articulated free binocular head Interpupillary distance: 55-75mm Double layers mechanical stage: 125x125mm Moving range X-Y: 60x40mm ABBE condenser: N.A.1.25 Coaxial coarse and fine focusing adjustable mechanism: 14mm Built-in adjustable brightness halogen lamp 6V/20W (or incandescent, fluorescent or LED) Net weight/set: 4kg Packing: 2 sets/carton Dimensions: 44 x 37 x 47cm Gross weight/carton: 10kg