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open cluster M11 from July 1st, 2018; only 70x20sec test; 8" f/4 newtonian; mod. Canon 77d; uv_ir filter; bortle 8 industrial area;


open cluster M11 from July 1st, 2018; only 70x20sec test; 8" f/4 newtonian; mod. Canon 77d; uv_ir filter; bortle 8 industrial area;





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