Protable HD Stereo Microscope 30X with Top & Bottom Illumination for Mineral
Total magnification 30X= (Eyepieces 10X) x(Objective lens 3X). 4.Built-in top light illumination. Total Magnification:30X. Upright binocular view head,the interpupillary distance is between 50-70mm. Long working distance is about 7-11.5cm.