Objective: Grouped From Any Two Objectives of 1X，2X，3X and 4X，Working Distance: 1X-55mm，2X-81mm，3X-61mm，4X-57mm
Wide Field Plane-Scope Eyepiece: WF10X，WF15X（Optional）
Total Magnification: 10X-20X，or 10X-30X，or 10X-40X，or 20X-30X，or 20X-40X，or 30X-40X
Articulated Free Binocular Head，Interpupillary Distance: 55-75mm，45º Inclined；
Illumination: Top/ Bottom Light: 12V/10W Halogen Lamp，with Ø95mm Frosted Glass Stage Plate
Rack and Pinion Coarse Focusing Mechanism With Slip Clutch and Tension Adjustment
Net Weight/Set: 2.4kg；
Package: 4 Sets/Carton61X35X36cm；
Gross Weight/Carton: 11kg