... 2,Objective: Achromatic DIN 4X,10X,40X(S),100X T-25 Microscope observation instumentUsesMonocular oblique cylinder compact series biomicroscopy observed ... and conveniently. Binocular head,trinocular head and monocular head are optional.,5. Eyepieces: Using double layer mechanical stage, it can ... N.A=1.25 with iris diaphragm,Kolher illumination is optional. T-25 Microscope observation instument