Universal Portable Measuring Microscope With Digital Camera 650g 100X

650g Weight100X Portable Measuring Microscope NC-P100 Series Cross With Reticle Description Specification: 　 NC-P100L NC-P50L NC-P40L NC-P20L Total Magnification 100× 50× 40× 20× Mechanical Tube Length 160mm Eyepiece 10× Objective 10× 5× 4× 2× Numerical Aperture 0.25 0.12 0.1 0.05 Diameter of Viewing field in Eyepiece φ18mm Eyepiece Reticle 0.1mm Fine Division 0.01mm 0.02mm 0.025mm 0.05mm Working Distance 6.93mm 17.6mm 18mm 17.2mm Focus Range 30mm Diameter of Bearing Plane