De Mairan's Nebula - a comma-shaped part of the Orion Nebula complex, separated by a dust lane. ~1,600 ly.
Scope: ~2500mm: 127-150mm Mak/SCT (+Barlow)
Camera: Colour OSC + dual-band Ha/OIII filter
Exposure: 120-180s subs, 3h+ total (guided)
