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M 51 (CVn)
Technical data: 16"f/8-Hypergraph and 15"f/5-Newtonian ST10XME without AO and AstroDon filterset LRGB (L=15x600s; R=5x300s; G=5x300s; B=5x300s; RGB bin1) Author: Bernd Flach-Wilken and Volker Wendel
Technical data: 16"f/8-Hypergraph ST10XME with Astronomik-Filterset Typ II , red filter RG 610 IR-blocked LRGB (L=6x900s; R=3x500s; G=3x650s; B=3x1500s; RGB bin2) Author: Bernd Flach-Wilken
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