The last photo of Hertel & Reuss 20x 20:1 N.A.0,50 microscope objective - Mikroskopteil

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Hertel & Reuss 20x - 20:1 N.A.0,50 microscope objective

(20:1 N.A.0,50 20x RMS microscope objective)

Hertel & Reuss 20x - 20:1 N.A.0,50 microscope objective - different 3 view — Photo 3 – Hertel & Reuss 20x - 20:1 N.A.0,50 microscope objective