AKA SH-114, also nicknamed the Dragon nebula in Cygnus.

This hydrogen structure is extremely faint!
I needed a very fast telescope (10" F2.8) with 20 min subs to get a descent SNR for more than 14 HRS!!!
Some BIN 2 data was also used to enhance it.

Ha-RGB image

Telescope - ASA 10" F2.8
Mount ASA DDM 60
3" ASA X0.73 reducer
Baader 2" filters

Hydrogen Alpha - 14 Hrs (Bin 1) - AS luminance
Hydrogen Alpha - 4 Hrs (Bin 2)
RGB - 30 min each (For star color)

Total about 20 Hrs - NO guiding

Imaged from my home in Gan-Yavne, ISRAEL
August - September 1017