... EW10X/22 Interpupillary: 48mm-75mmObjective: Plan Achromatic DIN 4X, 10X, 20X, 40X(S) Objective Working Distance: 25.4mm @ 4X, 11mm ... @ 40X Objective Field of View: 6mm @ 4X, 2mm @ 10X, 1.06mm @ 20X, 0.53mm @ 40X, Reflected Illumination: 6V/20W halogen lamp ... : One Trinocular Microscope HeadFour (4) Plan Achromatic Objectives, 4X, 10X, 20X, 40X(spring)One Pair of Extreme Widefield EW10X/22 EyepiecesOne ...