Taken at my mother's home in YL with Vixen VSD100 F3.8 astrograph + Atik 383L mono CCD, maybe 2 years ago.
Total exposure = 12x8min, autoguided with Vixen SX2 mount
Stacked and processed in PI with bias and darks calibrated only
Nothing special, just a practice in using PI's tools, and see if the faint background nebula of M42 can be captured under such a so heavily light polluted sky at that place.
M42 in Ha channel
誰在線上
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