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Unihedron stands for products related to the measurement of sky quality and the electromagnetic spectrum. The Canadian company's range is small but, in return, it is very special. Measuring devices for the darkness of a region (keyword Bortle scale/light pollution) and for the determination of spectral colours are the two main product areas. In addition, Unihedron supplies thematically appropriate posters for fans of spectral analysis or mathematical constants.

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