Auxiliary Objective Lens Thread For Zoom Stereo Binocular Trinocular Microscope

  
1 x 0.3X Microscope Auxiliary Objective Lens(Working Distance 287 mm). 1 x 0.5X Microscope Auxiliary Objective Lens(Working Distance 165 mm). 1 x 0.7X Microscope Auxiliary Objective Lens(Working Distance 120 mm).