Leitz λ First Order Red Compensator for Polarizing Microscope.

Nikon POL microscope Adjustable compensator Polarization adapter

Polarized microscope compensator Quartz wedge insert plate

Polarizing microscope complement 1/4λ Effect changes Compensation wave plate

LEITZ Wetzlar Ortholux Polarized Petrographic Microscope Rotating stage

Leitz Microscope -Polarizing / Centerable - 5 Place Centering Nosepiece

Leitz Microscope 12x4mm Red DIC Birefringence Compensator Rot.I