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RE: Orion & Horsehead Nebulae [3415x5160]
Thanks! :)
It's a stack of 20 60-second shots.
Stacking is a common practice in Astrophotography to deal with (thermal-)noise and inaccuracies of your tracking.
Yeah, I know, that's why I was asking. I've started with this some time ago, but it's not easy to find time for it. I'll try to start again this spring...