photography, exposure, spectro-photometer by Otto Lummer (1860 - 1925) and Eugen _Brodhun (1860 - 1938), drawing, 19th century, 19th century, graphic, graphics, light meter, light meters, light, lights, lightness, measurement device, measurement, measurements, measurement devices, measuring instrument, meter, gauge, measuring device, measuring instruments, meters, measuring devices, measuring apparatus, measuring, photometer, photometers, historic, historical, Additional-Rights-Clearences-Not Available

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Additional-Rights-Clearences-Not Available

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Size: 3759px × 2850px
Location:
Photo credit: © INTERFOTO / History / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 19th, apparatus, century, device, devices, drawing, eugen, exposure, gauge, graphic, graphics, historic, historical, instrument, instruments, light, lightness, lights, lummer, measurement, measurements, measuring, meter, meters, otto, photometer, photometers, spectro-photometer