The last photo of Steindorff Berlin microscope field diaphragm (iris diaphragm) - Mikroskopteil

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Steindorff Berlin microscope field diaphragm (iris diaphragm)

(Steindorff Berlin microscope field diaphragm (iris diaphragm))

Steindorff Berlin microscope field diaphragm (iris diaphragm) - different 10 view — Photo 10 – Steindorff Berlin microscope field diaphragm (iris diaphragm)