... metallurgical,chemical research institutes for metallurgaphy technic inspection and failure analysis Large Stage Measuring MicroscopeObjective: 4X,10X,PL20X,PL40X;Eyepiece: 10X, ... ;Stage: 400X300mm, moving range X-Y: 254X254mm;Coaxial coarse and fine focusing adjustable mechanism: 36mm, precision: 0.002mm;Blue, ... 50W halogen lamp;Function: bright field, polarizing, photograph,etc. measuring microscope