The combination of Hα and OIII (CCD) and RGB (DSLR) frames shows Ou4 and Sh2-129 together with the central star HR8119.
Image orientation : North is on the right.
Date: Fourteen nights in August / September 2016.
Telescope: #1: Skywatcher Esprit Apo 80 / 400 mm with flattener. #2: TS Apo 60 / 260 mm with reducer. Both telescopes were mounted parallel on Mesu 200 mount.
Camera: #1: Nikon D5100a. #2: MI G2-8300FW @ -25°C.
Exposure: #1: 150x300s + 71x240s+ 103x180s @ ISO 200. Only about 1/3 of these images where used in a RGB mosaic to reach the size of the narrowband images. #2: Hα (6nm): 1x1500s + 15x1200s; Hα (12nm): 46x900s (16h55m); OIII (12nm): 132x900s (33h00m).Overall exposure time: about 60h.
Location: Rhein-Main area, Germany.
Processing: MaximDL, Pixinsight.