NGC 1788 (Seen at upper Right) is a reflection nebula in the constellation of Orion.
It is rather sharply defined on its southwest perimeter where it is flanked by the dark nebula known as Lynds 1616.
Lynds 1616 is apparently part of NGC 1788.
The brightest involved star is 10th magnitude and lies in the northwest sector.(WIKI)

Ha for 4 HRS (bin 2)
Lum for 1.5 HR ( bin 1)
RGB - 30 min per color (bin 2)
Total of 7 HRS

Imaged with the 16" f3.75 Dream Astrograph.
Apogee Alta U-16M camera.

Imaged from Tivoli farm in Namibia