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, 45 inclined.

Illumination:Top/ bottom light:12v/10w halogen lamp, with 95mm frosted glass stage plate.Rack and pinion coarse focusing mechanism with slip clutch and tension adjustment.

Package:4 sets/carton61x35x36cm.

Gross weight/carton:11kg