parallel exposure L + RGB) (1)80 x 30 sec, Hyperstar 14" (F1.9), Sony A7s, ISO 4000, L-filter (2)20 x 120 sec, RASA 11" (F2.2), Starlight Xpress H36, binary 2x2, blue filter Tenerife 1180 m a. s. l. 2018-02-18 21:00h - 22:00h UT |
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