How to Setup & Focus a Stereo Microscope

Quickly and easily setup and focus your stereo microscope.

  • Turn on the illumination – adjust the light source so that it illuminates
  • Set the diopter setting(s) to zero



  • With the eyes about 0.5″ away from the eyepieces from the eyepieces, adjust the distance between the eyepieces (interpupillary distance) until you see a single image
  • Adjust the illumination brightness to the desired levels
  • Zoom up to the highest magnification
  • Closing the right eye (or the same eyepiece as the diopter adjustment), adjust the focus until you get a sharp image
  • Closing the left eye, adjust the eyepiece diopter until you obtain a sharp image (Make a note of your diopter setting for future convenience)
  • Note: Diopter adjustment is performed on just one of the eyepieces
  • Your stereo microscope is now correctly focused. Your sample will now be in focus throughout the zoom range


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