Carl Zeiss Jena NU / NU-2 microscope selenium photocell | photoelement for exposure time measurement - Video 1

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Carl Zeiss Jena NU / NU-2 microscope selenium photocell | photoelement for exposure time measurement

Video 1 – Carl Zeiss Jena NU / NU-2 microscope selenium photocell | photoelement for exposure time measurement