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NGC 7640 (And)
Technical data: 15"f/8-Newtonian with APO-Barlow and 16"f/8 Hypergraph used at f/12 ST10XME, AO-7 and AstroDon filterset and STL6303, AO-L and Astronomik filter set IIc LRGB in total (L=24x600s; R=6x600s; G=6x600s; B=6x600s; RGB bin2) Comments: FWHM 2,5" Author: Volker Wendel & Bernd Flach-Wilken
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