The last photo of Carl Zeiss Jena Phv Apl 0,9 variable phase contrast condenser phase ring (diaphragm) for 40x microscope objective - Mikroskopteil
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Carl Zeiss Jena Phv Apl 0,9 variable phase contrast condenser - phase ring (diaphragm) for 40x microscope objective
(Carl Zeiss Jena Phv Apl 0,9 microscope phase contrast condenser 40x ring)