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M42 trapezium too short exposed with C9.25 at 1525mm; mod. Canon 1100d; 60 x 125 msec; and too noisy, uv_ir filter; ha-filter would have been better ...


M42 trapezium too short exposed with C9.25 at 1525mm; mod. Canon 1100d; 60 x 125 msec; and too noisy, uv_ir filter; ha-filter would have been better ...





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