Digital Comparison Microscope Specification: 1.optical viewer magnification: 4X-216X 2.ocular:10X ,20X 3.objective lens:0.7-4.5X continue adjust, low power objective0.4X 4.viewing field:ø4mm-64mm 5.working distance: ø95mm 6. light source: 12V 50W air-cooled strong light source, ø10mm soft fiber light source